CANON POWERSHOT G3 Service Manual

Application

This manual has been issued by Canon Inc. for qualified persons to learn technical theory, and repair of the products.

Corrections

This manual could include typographical errors or technical inaccuracies due to improvements or changes in the products. When changes occur in applicable products or in the content of this manual, Canon will release service manual report as the need arises. In the event of major changes in the contents of this manual over a long or short period, Canon may issue new editions of this manual.

The following paragraph does not apply to any countries where such provisions are inconsistent with local law.

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The product names and company names described in this manual are the registered trademarks of the individual companies.

Copyright

This manual is copyrighted with all rights reserved. Under the copyright laws, this manual may not be copied, reproduced, published (including on the World Wide Web) or translated into another language, in whole or in part, without the written consent of Canon Inc..

Copyright © 2002 by Canon Inc. CANON INC.

Digital Imaging Products Service Dept. 30-2, Shimomaruko 3-Chome, Ohta-ku, Tokyo 146-8501, Japan

SAFETY PRECAUTIONS

The following precautions should be observed when servicing.

1.Since many parts in the unit have special safety-related characteristics, always use genuine CANON replacement parts. Especially critical parts in the power circuit block should not be replaced with other makes.

Critical parts are marked with ! in the schematic diagrams.

2.When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

3.After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly installed.

4.After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards. 4-1 Leakage Current Cold Check

1)Unplug the AC cord and connect a jumper between the two prongs on the plug.

2)Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part

on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the chassis, the reading should be between 1MΩ and 5.2MΩ. When the exposed metal does not have a return path to the

chassis, the reading must be ∞.

4-2 Leakage Current Hot Check

1)Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.

2)Connect a 1.5KΩ 10 watt resistor, paralleled by 0.15µF capacitor, between each exposed metallic parts on the unit and a good earth ground such as a water pipe, as shown in the figure below.

3)Use an AC voltmeter, with 1000Ω/volt or more sensitivity, to measure the potential across the resistor.

4)Check all exposed metallic parts of the cover (Cable connection, Handle bracket, metallic cabinet. Screwheads, Metallic overlays, etc), and measure the voltage at each point.

5)Reverse the AC plug in the AC outlet and repeat each of the above measurements.

6)The potential at any point should not exceed 0.75V RMS.

A leakage current tester (FLUKE MODEL : 8000A equivalent) may be used to make the hot checks. Leakage current must not exceed 0.5 milliamp.

In case a measurement is outside of the limits specified, there is a possibility of a shock hazard, and corrective action must be taken before returning the instrument to the customer.

		AC VOLTMETER
	DEVICE
	UNDER
	TEST	1.5KΩ
	Test all
	exposed	0.15µF
	metal parts
		Water pipe
		(Earth Ground)
AC OUTLET	Figure. 1 Leakage Current Hot Check

CHAPTER 1. GENERAL DESCRIPTION

		OF PRODUCT
	CONTENTS
1	Development Background
	1-1	Development Objectives ---------------------------------------------------------------------------------------------------	1-1
	1-2	Product Concepts ------------------------------------------------------------------------------------------------------------	1-1
	1-3	Design Concepts -------------------------------------------------------------------------------------------------------------	1-5
	1-4 Spec. comparison between PS G3 and PS G2 --------------------------------------------------------------------------		1-6
2	Features
	2-1	High Image Quality ---------------------------------------------------------------------------------------------------------	1-7
	2-2	Full Features -----------------------------------------------------------------------------------------------------------------	1-9
	2-3	Operation Ease --------------------------------------------------------------------------------------------------------------	1-18
	2-4	System Accessories --------------------------------------------------------------------------------------------------------	1-21
	2-5	Application Softwares -----------------------------------------------------------------------------------------------------	1-23
3	Exterior
	3-1	Exterior Photos ------------------------------------------------------------------------------------------------------------	1-28
	3-2	6-dimensional diagram ---------------------------------------------------------------------------------------------------	1-29
	3-3	Nomenclature ---------------------------------------------------------------------------------------------------------------	1-30
	3-4	Display Panel ---------------------------------------------------------------------------------------------------------------	1-31
	3-5	UI Display -------------------------------------------------------------------------------------------------------------------	1-32
4	Specifications
	4-1	Camera Specifications -----------------------------------------------------------------------------------------------------	1-34
	4-2	System Requirements ------------------------------------------------------------------------------------------------------	1-47
	4-3	Accessory Specifications -------------------------------------------------------------------------------------------------	1-48
5	System
	5-1	Accessory Compatibility -------------------------------------------------------------------------------------------------	1-49
	5-2	System diagram ------------------------------------------------------------------------------------------------------------	1-51
6	Additional
	6-1 iSAP (Intelligent Scene Andlysis based on photographic Space) Technology ------------------------------------		1-52

*Please refer to Technical Guidance for PowerShot G1 (TI-00903) and PowerShot G2 (TI-00901) aiso.

1 Development Background

1–1 Development Objectives

The PowerShot G2, which went on sale in the fall of 2001 as the successor to the PowerShot G1, won very high acclaim from the market for its high degree of perfection covering “picture quality”, “functionality” and “design”. As a result, the camera achieved a stable demand from both advanced “artistically oriented” amateurs and industry users looking for “dependability”. Therefore, it is vital that the next model to the PowerShot G2 aim for even more enhanced performance while continuing this concept.

With this background in mind, we initiated development of the PowerShot G3, as the top model of the PowerShot series, with a new built-in large-diameter 4x zoom lens and DIGIC (Digital Imaging Processor) to get the most out of the enhanced high picture quality generated by the 4-megapixel CCD and the primary color filter. Furthermore, the PowerShot G3 will aim for a different evolutionary path by adding bracketing features and end-sync photography to provide “the finest picture quality with the foremost functions”.

+			High Image Quality
	PowerShot G2		Highresolution4xzoomlens
			DIGIC(DigitalImagingprocessor)
		Full Features						Application Software
	Automatic vertical/horizontal detection by SI sensor
								NewZoomBrowserEX
	Voluntary settings of AF frame							NewFileViewerUtility
	Bracketings features
				PowerShot G3
		System Accessories					Operation Ease
		NewWide/Teleconvertor					Electronicdial
		CompatiblewithMacroTwinLightMT-24EX					Functionbutton

1–2 Product Concepts

The PowerShot G3, successor to the PowerShot G2, aims to be the top in its class in terms of picture quality by employing a 1/1.8-inch, 4-megapixel-class CCD and incorporating a newly developed f/2.0 (wide-angle) “largediameter lens” with four-times zoom capability and the “DIGIC (Digital Imaging Processor)”, which provides enhanced high-quality image processing functions. In terms of function, the product concept has included specifications so that advanced amateurs and semi-professionals can take full advantage of sophisticated camera techniques.

The PowerShot G3 is also equipped with the “My Camera” feature of the PowerShot S30/S40 and IXY Digital 300a models, and adds new “creation of on-camera content” capability.

1-1

N: New features unique to the PowerShot G3 (autumn 2002 model)

U: Updated features from the PowerShot G2 (already equipped on other models)

High Image Quality

N - High-resolution large-aperture (f/2.0-3.0) 4x zoom lens (35 mm film equivalent: 35 to 140 mm)

N - High definition and fast processing with the newly developed “DIGIC (Digital Imaging Processor)” N - Nine-position high-precision white balance (auto + 6 preset positions + 2 manual positions)

U - Super intelligent (SI) sensor improves precision of AE/AF/AWB

-High-resolution, 1/1.8-inch CCD with 4 million camera effective pixels (4.1 million pixels in total)

-Primary color filters for excellent color reproduction

-Wide range of ISO-equivalent settings (Auto/ISO 50/100/200/400 equivalent)

-Multi-step iris control and elegant blur owing to iris type aperture

-RAW mode recording

-Support for Exif 2.2

Full Features

N - Macro shooting range of 5 centimeters in wide-angle mode and 15 centimeters in telephoto N - Insertion of neutral density (ND) filter makes it possible to produce blur effects and to take

flash photos in macro mode

N - Selectable between evaluative metering, center-weighted average metering and spot metering (linked to AF frame/fixed to center)

N - AF range frame can be set arbitrarily N - Bracketing options (AE / Focus)

N - Interval shooting function for fixed-point observation over long periods

N - Wireless controller with settable operation delays (instantaneous / 2-second delay / 10-second delay)

N - Selectable of first-curtain sync and second-curtain sync flash (built-in flash / external flash) N - Flash output can be adjusted manually (built-in flash / external flash)

N - Slave function of external flash units can be used

N - 2 custom mode positions are included on mode dial to allow users to preset photo parameters freely

N - “Custom” position, allowing users to preset parameters, added to the photo effect positions as a photo effect (vivid color, neutral color, low sharpening, sepia, black and white)

N - Settable display times for rec review (Off, 2 to 10 seconds)

N - Storage in RAW mode can be selected after recording an image N - Unwanted scenes can be deleted in movie playback mode

N - Continuous movie recording and playback with audio with long filming times (three minutes) (selectable from QVGA and QQVGA)

N - My Camera function for creating on-camera content U - 1/1250 second shutter speed with open aperture

U - Built-in flash with 5 controls (slow sync) U - On/Off selection of AF-assist beam

1-2

U - Digital zoom continuously changes the field of view (approx. 3.6x ; approx. 14x magnification when combined with optical zoom)

U - Super intelligent (SI) sensor automatically detects vertical or horizontal photography

U - Magnified playback for easy confirmation of images (from approximately two times to 10x zoom magnification)

U - Next frame, previous frame, fast forward, rewind, first frame and last frame end available during movie replay

U - Supports DPOF format slideshows and image transfers

U - Sound annotation function (sound memos up to 60 seconds in length can be recorded during replay)

U - Direct print function for card photo printers (CP-100/10) and Bubble Jet printers (BJ 895PD, BJ 535PD and BJ F890PD)

U - Self-timer photography (selectable from two or 10 seconds)

-“High speed” (2.5 images/sec) or “normal” (1.5 images/sec) select able as continuous shooting modes

-Total of 13 image quality modes (4 recording pixels x 3 compression ratio, RAW)

-Histogram displays during rec review function and replay

-Manual settings (aperture-priority AE, shutter speed-priority AE, manual focus*, manual exposure, flash compensation, exposure compensation)

-AF modes that permit switching the ranging points (three points, available with continuous AF and single AF)

-AE lock / FE lock functions

Operation Ease

N - User interface makes a diverse set of functions easy to understand (electronic dial, independent mode dial and mode lever, large-sized display panel)

N - Driver-less computer connections with Picture Transfer Protocol (PTP) support U - Change to shooting mode by pressing the shutter button (in replay mode)

U - USB interface accepts multipurpose connectors

U - Independent white balance/exposure compensation controls and Function button improve operability

U - Manual focus adjustment with better usability U - One-touch reset of all settings

-(New) digital signal processing IC + buffer memory for stress-free operation

-Shutter click sound similar to that of a film-based camera

-Vari-angle LCD monitor

-Immediate switching between shooting and replay

-Fast image transfer (replay mode)

-Video output system (PAL/NTSC) can be switched by user

-Complies with the CF Type II standard, allowing use of high-capacity storage media

-Ability of volume setting with each operation sound

-Grip molded into body of camera and a strap attached to the camera at both ends allow user to hold camera securely

-UI supporting twelve languages

-Large capacity lithium ion rechargeable battery (In addition to the BP-511, the BP-512, which has a different shape, can also be used)

1-3

System accessories

N - New Wide Converter* and Tele-converter* configurations

* New lens adapter is required for mounting

N - New fast image storage CF card (256 MB)

N - Support for EOS-type EX Speedlites (including the MT-24EX Macro Twin Lite)

N - Various Speedlite accessories (such as transmitters and camera shoe cord 2) can be used

Application software

N - ZoomBrowser EX 4.0 (Win) made more ergonomic

(ImageBrowser 2.7 (for Mac) is as in the past)

-Photorecord 1.6 (Win) for easy layout and printing of many pictures

-PhotoStitch 3.1 for creating panoramic pictures with precision

-RemoteCapture 2.6 for remote picture-taking through a PC (permits display of the Finder screen on the PC)

N - New File Viewer Utility 1.0 application for processing RAW images

-TWAIN Driver 5.0 / WIA Driver 5.0 (Win)

-USB Mounter 1.8 (Macintosh) that allows the system to handle the camera as a card reader N - CP-100/CP-10 2.1 Printer Driver

-Adobe Acrobat Reader 4.0 for Printer Driver’s manual

-Third-party software of established reputation

Apple QuickTime 5.0 (for creating movies/QVTR files)

Adobe Photoshop LE (for processing/editing images)

1-4

1–3 Design Concepts

zImprovement and refinement of primary operations

<Optimized button layout, configuration and operation flow> <Thorough revision of control section for usability>

• Electronic dial

Employs an electronic dial in addition to previous cross-configured buttons (omni selection)

Dial position, angles and configuration have been optimized ÆImproved operation feeling of Av/Tv/MF operations

• Independent mode lever

Separated the previous two-stage dial into a mode dial and mode lever

ÆLever shape has a nice movement and smoother two-position selection of shooting and replay

• Slanted zoom lever/shutter button

ÆThe entire lever section is slanted so that it fits the finger naturally when holding the camera

• Improvement of handling

Further evolution of the shape of the grip

ÆHandling is greatly improved with an increase in the area that comes in contact with fingers ÆThe additon of the electronic dial contributes to the high-class device finish

zProduction of a “virile” image by slimming the body

<Shapes up the body by reducing its thickness>

• Flat body

The basic silhouette is now almost completely flat apart from the lens barrel and grip section Eliminated the rear LCD panel bump, which stuck out even when stored, to give a slim look

1-5

1-4 Spec. Comparison between PS G3 and PS G2

			PowerShot G3	PowerShot G2
	Image sensor (CCD)		Camera effective pixels : Approx. 4 M	←
			1/1.8 inch size (Total pixels: Approx. 4.1 M)
	Color filter		Primary color filter (Beyer)	←
	Lens (35mm film equivalent)		35-140 mm, F2.0-3.0	34-102 mm, F2.0-2.5
	Optical zoom		4x	3x
	Digital zoom		Approx. 3.6x	←
	Shooting distance	Normal	50 cm - infinity	70 cm - infinity
	(from tip of the
		Macro	5 - 50 cm (W), 15 - 50 cm (T)	6 - 70 cm (W), 20 - 70 cm (T)
	lensbarrel)
	Optical view finder		Real-image optical zoom view finder	←
	LCD monitor		1.8 inch low -temperature polycrystalline sillicon	←
			TFT color LCD
			TTL-AF (Continuous/Single)	TTL-AF (Continuous/Single)
	Autofocus		AF lock and manual focus are available.	AF lock and manual focus are available.
			Focus point : 1 point (free / center)	Focus point : 3 point (AiAF) / 1 point (center)
			Evlauation / Center-w eighted averaging / Spot	Evaluation / Center-w eighted averaging / Spot
	Metering modes		(Metering frame of Spot :
				(Metering frame of Spot : AF point-linked ON/OFF)
			center fixed / AF point-linked)
			Program AE / Shutter speed-priority AE /
	Exposure control system		Aperture-priority AE / Manual	←
			(AE lock is available)
	Exposure compensation		+/- 2 stops in 1/3-stop increments	←
			(AEB mode is available)
	Sensitivity (ISO film speed)		Auto / ISO 50/100/200/400 equivalent	←
	White balance		Auto + Pre-set (6 positions) + Manual (2 positions)	Auto + Pre-set (6 positions) + Manual
	Shutter type		Mechanical shutter + electronic shutter	←
	Shutter speed		15 - 1/2000 sec.	15 - 1/1000 sec.
	Flash range		0.7 - 5.0 m (W), 0.7 - 4.0 m (T)	0.7 - 4.5 m (W), 0.7 - 3.6 m (T)
			Auto / Creative zone (Program/ Shutter speed priority/	Auto / Creative zone (Program/ Shutter speed spriority/
			Aperture priority/ Manual/ Custom 1/ Custom 2) /
				Aperture priority/ Manual) / Programmed image control zone
	Shooting specifications		Programmed image control zone (Portrait/ Landscape/ Night
			Scene/ Stitch Assist/ Movie)	(Pan Focus/ Portrait/ Landscape/ Night Scene/ Photo Effect/
				Stitch Assist/ Movie)
			*Photo effect is set by menu
			High speed (Approx. 2.5 images/sec.),
	Continuous shooting		Normal (Approx. 1.5 images/sec.)	←
			<Large x Fine, LCD monitor off>
	Recording media		CompactFlash card (Type I or Type II )	←
		Still	Design rule for Camera File system,	←
	File format		DPOF(Ver 1.1) compliant
		Movie	AVI	←
		Still	JPEG (Exif 2.2 compliant) / RAW	JPEG (Exif 2.1 compliant) / RAW
	Recording format			(Exif 2.2 is available after dow nload)
		Movie	Image: Motion JPEG Audio:WAVE(Monaural)	←
		Still	(L) 2272 × 1704, (M1) 1600 × 1200	←
	Recording pixels		(M2) 1024 × 768, (S) 640 × 480
			(QVGA) 320 × 240 Approx. 3 min. at 15fps	(QVGA) 320 × 240 Approx. 30 sec. at 15fps
		Movie
			(QQVGA) 160 × 120 Approx. 3 min. at 15fps	(QQVGA) 160 × 120 Approx. 120sec at 15fps
	JPEG compression mode		(SF/F/N) x (L/M1/M2/S) + RAW (13 pattern)	←
			Single / Index (9 thumbnail images) / Slide Show / Movie /	Single / Index (9 thumbnail images) / Slide Show / Movie /
	Replay mode		Magnification (2-10x) / Sound Annotations (The max.
				Magnification (3x, 6x)
			record/play time is approx. 60 sec.)
	Direct print		O	←
			Start-up image/ Start-up sound/ Shutter sound/ Operation
	My Camera settings		sound and Self-timer sound	×
			(Creation of on-camera content is available.)
	Interface		USB, Audio / Video output	←
			Rechargeable Lithium battery (BP-511/BP-512)
		Source	/ Compact Pow er Adapter (CA-560)	←
			/ Car Battery Adapter (Optional Car Battery
	Pow er supply		Cable Kit CR-560 is recommended)
			Shooting capacity:	Shooting capacity:
		Perform	Approx. 450 images (LCD monitor ON)	Approx. 400 images (LCD monitor ON)
		ance	Approx. 1050 images (LCD monitor OFF)	Approx. 1000 images (LCD monitor OFF)
			Replay time: Approx. 360 min.	Replay time: Approx. 300 min.
	Dimensions (W x H x D)		121.0 x 73.9 x 69.9 mm	120.9 x 76.6 x 63.8 mm
	Weight (excluding batteries		Approx. 410 g	Approx. 425 g
	and CF card)

1-6

2 Features

2–1 High Image Quality

- High-resolution large-aperture (f/2.0 to 3.0) 4x zoom lens (35 mm film equivalent: 35 to 140 mm)

The photo lens of the PowerShot G3 is a 4x zoom lens with a focal length of 7.2 to 28.8 mm (35 mm film equivalent: 35 to 140 mm) that permits a wide range of photography from scenery to snaps. An aperture f number of f/2.0 to 3.0 is realized at the same time as providing four-times zoom magnification.

The lens is constructed in four blocks with an 8-element, seven-group construction including an aspherical lens. Focusing is achieved with a rear-focusing method that moves only one lens surface. Minimizing the number of focusing lenses achieves higher speeds and saves energy.

- High definition and fast processing with the newly developed “DIGIC (Digital Imaging Processor)”

The PowerShot G3 comes equipped with the “DIGIC (Digital Imaging Processor)”, a newly developed image processor. DIGIC (Digital Imaging Processor) achieves enhanced high picture quality by improving signal processing algorithms as the successor of new DIGIC (Digital Imaging Processor).

The following* are the main advances of the DIGIC (Digital Imaging Processor).

•Improved picture quality

•Improved AF accuracy

•Improved processing speed

*DIGIC (Digital Imaging Processor) features many improvements, but the three points above are the principle contributions to the PowerShot G3.

CF

Card Flash

PROM

	Lens/CCD	DIGIC	CPU	USB
				AUDIO
		(Digital Imaging
		Processor)		VIDEO

SDRAM LCD

Figure 2–1 Block diagram

1-7

<Judge as sky>

- Nine-position high-precision white balance (auto + six preset positions + two manual positions)

The PowerShot G3, like the PowerShot G2, divides the entire screen into thousands of individual blocks, compiles white balance data from each block and performs white balance calculations. Therefore, extremely precise control is achieved.

In addition, an extra “custom white balance*” position has been added to the previous single position. In the custom white balance position, a photo of a desired white reference (usually white paper) is taken under certain photo (lighting) conditions and that data is stored in the camera. With two positions for different environments, such as outdoors and indoors, the appropriate white balance can be selected with one touch.

*Once the data is set it is maintained until the white balance is reset.

-Super intelligent (SI) sensor improves precision of AE/AWB

The PowerShot G3 incorporates the same SI sensor as the IXY DIGITAL 200a/300a. The SI sensor is an orientation detector and can distinguish whether the camera is

positioned vertically or horizontally when taking a photo. When shooting outdoors, the AE or AWB controls may, for

example, tend to darken the overall image if a bright sky takes up a large portion of the image or add a yellow tint to the whole photo due to the effect of a blue sky.

With the introduction of the SI sensor, the upper portion of the image can be identified, make the precise control that minimizes the influence of the sky possible.

Photo 2–1 Vertically orientated photograph

1-8

2–2 Full Features

- Macro shooting range of 5 centimeters in wide-angle mode and 15 centimeters in telephoto

With the PowerShot G3, macro shots can be taken as close as 5 centimeters from the top of the lens in wide-angle mode and 15 centimeters in telephoto mode. In this case, the area of the photographed subject is approximately 74 mm by 54 mm in the wide-angle mode and 55 mm by 41 mm in the telephoto mode.

41mm

55mm

<Telephoto setting>

Figure 2–2 Photograph area

-Insertion of neutral density (ND) filter makes it possible to produce blur effects and to take flash photos in macro mode

The PowerShot G3 makes it possible for the first time to insert an ND (light reducing) filter. In this way, a wider aperture than usual can be used even in bright conditions to produce blur effects (see Photograph 2–2A). By stopping down the aperture to slow the shutter speed, so-called slow shutter effects can also be obtained (see Photograph 2–2B). Furthermore, flash photography becomes possible at macro distances, normally difficult to do because it results in overexposure (see Photo 2–2C).

The ND filter is to have approx. three steps of light reduction.

<A>

<C>

<B>

Photo 2–2 Photographic effects with the ND filter

- Selectable between evaluative metering, center-weighted average metering and spot metering (linked to AF frame/fixed to center)

Three light metering modes can be selected on the PowerShot G3, like the PowerShot G2 — evaluative metering, center-weighted average metering and spot metering. When spot metering is selected, the light metering point can be chosen to be either linked to the AF frame or fixed to the center of the photo frame.

1-9

- AF range frame can be set arbitrarily

The PowerShot G3 has been made so that the position of the range frame when in AF mode can be arbitrarily selected. In this way, an arbitrary subject in the photo frame can be focused without changing the framing of the shot.

Specifically, the cross-configured buttons are used to shift the range frame left, right, up and down.

AF metering frame range

Figure 2–3 Movement range of AF frame

- Bracketing options (AE • Focus)

The PowerShot G3 adds focus bracketing to the previous AE bracketing (PowerShot G2).

Focus bracketing takes three successive shots moving the focus position in front and behind the current position. The difference between each shot can be set to large, medium or small. In this way, a fine focus position can be found matching the photographer’s intention even when precise focus positions are demanded such as with macro photography.

- Interval shooting function for fixed-point observation over long periods

The PowerShot G3 comes with an interval shooting function that can take a sequence of photos at fixed time intervals. As a result, fixed-point observation over long time periods (100 hours maximum) can be achieved. The interval between shooting can be set in minutes between approximately one and 60 minutes*1, and the total number of shots can be set between two and 100 frames*2.

*1 When using an external flash, photos will continue to be taken at the set interval regardless if the set interval is shorter than the recycle time of the flash unit or if the flash stops operating because the battery expires.

*2 The interval shooting stops if the CF card becomes full before the specified number of photos is taken.

One minute

Measurement of traffic flows

Observation of solar or lunar eclipses

Birth of chicks (animals)

Changes in weather conditions (showers, typhoons)

Observation of sunrises and sunsets

Observation of stars

Observation of lake tides

Blossoming of flowers

60 minutes

Figure 2–4 Examples of interval photography

1-10

-Wireless controller with settable operation delays (instantaneous / two-second delay / 10-second delay)

Although the PowerShot G3 has the same remote control capability with a wireless controller as the PowerShot G2, it adds “instantaneous” and “10-second delay” options to the fixed two-second delay of the previous controller. This sets the time from the operation of the wireless controller to the start of the camera’s operation.

When “instantaneous” is selected, operation begins without a time lag; selecting “10-second delay” makes it possible to use the controller as a self-timer.

Because the remote control receiver is mounted on the side of the camera, it can be operated from behind the camera as well.

- Selectable of first-curtain sync and second-curtain sync flash (built-in flash / external flash)

The flash exposure timing can set to either “1st-curtain” or “2nd-curtain” on the PowerShot G3.

With 1st-curtain timing, the flash is exposed immediately after the shutter opens. With the 2nd-curtain method, the flash is exposed immediately before the shutter closes. If the subject is stationary, the result is the same regardless of the method used; however, a large difference occurs when photographing moving objects, especially those emitting light.

	Advantage	Disadvantage
First curtain flash sync.	Congruity with release/firing timing	Congruous picture is taken when moving object with emission of light.
Second curtain flash sync.	Congruous picture is taken when moving object with emission of light.	Incongruity with release/firing timing

Table 2–1 Comparison of start and end sync methods

<First curtain sync.>

<Second curtain sync.>

Photo 2–3 Flash photography

- Flash output can be adjusted manually (built-in flash / external flash)

When using the flash, the camera controls the strength of the flash for normal optimal exposure. However, depending on shooting conditions, it may not be possible to obtain optimal exposure or it may be desirable to change the flash output intentionally.

In order to handle these situations, the PowerShot G3 has been specified so that the flash output can be set manually. When using external flash units, the exposure can be adjusted in one-third stop intervals from full exposure to –4 stops (see Table 2–2). The built-in flash can be set to three levels — weak, medium and strong (full exposure).

Setting	1	-1/3	-2/3	-1	-4/3	-5/3	-2	-7/3	-8/3	-3	-10/3	-11/3	-4
Light Amount	1(Full)	0.79	0.63	0.5	0.4	0.31	0.25	0.2	0.16	0.13	0.1	0.08	0.06

Table 2–2 Flash strength settings for external flash units

1-11

Figure 2–5 Conceptual diagram of slave flash exposure

Additional Flash (Available slave function )

Additional Flash (Available slave function)

Camera Flash

- Slave function of external flash units can be used

In order to improve the lighting around the subject such as for studio shots, fill flashes are often used. In this case, the slave unit used for fill flashes detects light from the main flash and sends a trigger signal to the fill flashes. However, a problem can occur in the normal course of flash photography if a pre-flash is used to adjust the lighting,

because the slave unit will detect this light and fire the fill flashes.

To prevent this problem, the PowerShot G3

is equipped with a mode (Flash Adjust-Manual) that does not use pre-flashes

when using external (fill) flashes. Using this function avoids the problem of pre-flashes triggering fill flashes because pre-flashes are not used. In this case, the strength of the main unit flash (or flash mounted on the main unit) is set manually.

-Two custom photo mode positions are included on mode dial to allow users to preset photo parameters freely

On the PowerShot G3, two positions on the mode dial are reserved for “custom” modes so that users can store their preferred modes and parameters. In this way, it is not necessary to adjust settings for each photo.

-“Custom” position, allowing users to preset parameters, added to the photo effect positions as a photo effect (vivid color, neutral color, low sharpening, sepia, black and white)

The PowerShot G3 adds a “custom” position to the photo effect positions so that users can define their own preferred image effects. In the custom position, the contrast, sharpness and color intensity can be selected and saved independently from three levels — (–), 0 and (+).

Photo Effect	Description	Effect
Vivid color	Emphasizes contrast and color intensity	Produces a vivid and sharply-defined image
Neutral color	Reduces contrast and color intensity	Produces a subdued, plain image
Low sharpening	Reduces edge’s emphasis	Produces a mild image
Sepia	Adds sepia toning to the color information	Creates an old-fashioned appearance
Black & White	Sets the color gain to "0," producing a black & white image	Produces a binary image with sharp contrast; used for text
Custom	Contrast, sharpness and color set by users	Produces image effects with user’s intention

Table 2–3 Description and effects of image effect settings

- Settable display times for rec review (two to 10 seconds)

The PowerShot G3 is specified so that the image-display time* in rec review (confirmation of recorded image) can be set between 2 and 10 seconds in one second intervals. In this way, users can select a duration to suit their applications.

* “Off” can also be set

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- Storage in RAW mode can be selected after recording an image

Even when shooting with normal JPEG storage is selected, the PowerShot G3 allows the recorded image to be saved* as a RAW image using the function button in the rec review (confirmation of recorded image) mode. (Valid only when P, Tv, Av or M is selected)

In this way, when the white balance, color effects or other planned effects are not obtained, or when the number of stored pixels is to be modified in the execution of the end work, it can be reprocessed after storage by converting and storing the image in the RAW mode.

*If there is insufficient memory on the CF card, the image will be saved as a normal JPEG image. An image cannot be saved in both RAW and JPEG formats.

•Unwanted scenes can be deleted in movie replay mode

The PowerShot G3 allows unwanted sections to be deleted in the movie replay mode. However, the sections that can be deleted are either from the start of the recording to an arbitrary point or from an arbitrary point to the end of the recording.

Delete

		OR
				Delete
		OR
	Delete			Delete
Rec. Start				Rec. Stop
		Figure 2–6 Conceptual diagram of movie editing

-Continuous movie recording and replay with audio with long filming times (three minutes) (selectable from QVGA and QQVGA)

The PowerShot G3 can record moving images at 15 frames per second along with audio in two formats, QVGA (320 by 240 pixels) and QQVGA (160 x 120 pixels). Because a method is employed that consecutively writes images that are temporary stored in the buffer to the CF card while recording, long continuous filming times are also achieved.

In practice, if the write speed of the CF card is slower*1 than the speed to write an image to the buffer, the recording will stop when the buffer capacity is reached. Taking this circumstance into account, the specification limits the maximum recording time in both QVGA and QQVGA formats to three minutes. Even after three minutes of elapsed filming, the G3 allows the next recording to be resumed in less time than previous models.

During filming, the values for the focus, exposure, white balance and zoom position determined at the beginning are used continuously to the end of the recording. The storage time is also displayed on the LCD monitor during filming.

The file is saved in AVI format, while the image is saved as Motion JPEG data and the audio data in WAVE format (mono).

*1 The write speed varies depending on the brand and capacity of the CF card.

*2 If the free space on the CF card is less than the size of the recording, recording will stop just prior to the CF card reaching full capacity.

CCD		Signal Processing/Resize/JPEG		Buffer		File			CF Card
				Memory		Format

Transfer the foramer image while storage new image

Figure 2–7 Conceptual diagram of continuous moving image recording

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- My Camera function for creating on-camera content

The PowerShot G3 start-up image, start-up sound, operation sounds, self-timer sound and shutter sound can be customized with the My Camera function from the Solution Disk included with the camera or from the “My Camera Contents” on the Canon Image Gateway Web site accessible via ZoomBrowser EX/ImageBrowser. Also, images or sounds* captured with the camera itself can be used as camera contents.

*The start-up sound, operation sound, self-timer sound and shutter sound can be recorded separately with the microphone.

*Only for the Japanese market.

-1/1250 second shutter speed with full aperture

Although the PowerShot G2 achieves a maximum shutter speed of 1/1000 second, the speed is limited to 1/500 second due to mechanical constraints when the full aperture (f2.0/2.5).

Due to an improvement in the shutter/aperture driving mechanism, the PowerShot G3 realizes a shutter speed of 1/1250 second even when the full aperture.

- Built-in flash with five controls and improved usability (slow sync response)

For the PowerShot G3, the order of the flash modes set previously with a toggle movement (auto Æ auto redeye reduction Æ forced red-eye reduction flash Æ forced flash Æ Off Æ) has been improved as shown in Figure 2–8.

Red-eye				Red-eye
reduction on				reduction off

X

Auto

On

(Off)

Figure 2–8 Flash mode transition diagram

- On/Off selection of AF-assist beam

Many of the models in the PowerShot and IXY DIGITAL series are equipped with an assist beam to ensure proper autofocus when the ambient brightness is below a certain threshold. However, in more than a few instances, when photographing animals in a dark environment for example, the AF-assist beam may cause them to run away spoiling a photo opportunity.

The PowerShot G3 includes the ability to turn the AF-assist beam off to handle these photo situations*.

*When the ambient light level is extremely low, the AF function may be unable to determine the proper focus. In such cases, the focus is fixed at a specific point.

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-Digital zoom continuously changes the field of view (approx. 3.6x ; approx. 14x magnification when combined with optical zoom)

The PowerShot G3 can adjust the field angle by up to a maximum of 14 times (35 mm film equivalent: 35 to 490 mm) by combining a 3.6-times digital zoom magnification with the optical four-times zoom lens.

Furthermore, several dozen image input positions are calibrated for the monitor display to ensure a smooth digital zoom of the image on the monitor display. The actual zoom position can be stopped in six positions including both end positions in consideration of practicality.

Due to fast signal processing, the optical zoom and digital zoom are driven at nearly the same speed so that no peculiarity is sensed in operation (during switchover).

Recording Pixels(Image Quality)

2308 X 1712

	< at L size >
2048 X 1536
1600 X 1200
	PowerShot G3
1280 X 960
1024 X 768	PowerShot G2
800 X 600
640 X 480

50

100

150

200

250

300

350

400

450

Focul length of 35mm film equivalent(mm)

Figure 2–9 Comparison of digital zoom picture quality

- Super intelligent (SI) sensor automatically detects vertical or horizontal photography

The PowerShot G3 employs the same SI sensor as the IXY DIGITAL 200a/300a. The SI sensor detects orientation and can determine if the camera is held vertically or horizontally when taking a picture.

By using this feature, photographs taken vertically are displayed vertically on the LCD monitor during replay

and horizontally oriented photographs are shown horizontally. Furthermore, when printing with the Camera direct print function compatible CP-10 or CP-100 printer, the orientation is automatically detected and the date can be inserted in the right of lower corner the prints. In the same way, layouts using ZoomBrowser EX/ImageBrowser automatically detect and account for the photo’s orientation.

Photo 2–4 External appearance of SI sensors

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- Magnified playback for easy confirmation of images (from approx. 2x to 10x zoom magnification)

During replay on the PowerShot G3, the image can be magnified from 2 to 10 times with the image magnification control. Because zooming has

been made possible, the image is magnified in a continuous fashion. Pressing the set button while magnifying steps the magnification in three preset ratios of 2.5, 5 and 10.

The magnified image can be scrolled to view a desired region.

<Original>

<10x Enlarge>

Photo 2–5 Magnified replay (original / 10x magnification)

-Next frame, previous frame, fast forward, fast reverse, first frame and last frame available during movie replay

During movie replay on the PowerShot G3, next frame, previous frame, fast forward and fast reverse operations that correspond to those of a VCR are provided. Instantaneous jumps to the start or end of a clip are also provided, which are impossible with tape media.

_ _ _ _ _ _ _ _ _		_ _ _ _ _ _ _ _ _
First frame	Previous frame	Next frame	Last frame

Figure 2–10 Conceptual diagram of frame navigation during movie playback

- Supports DPOF format slideshows and image transfers

The PowerShot G3 supports the optional DPOF slideshow and image transfer functions.

The slideshow function automatically plays back those images that have been marked; the image transfer function automatically transfers those images that have been marked to a computer.

- Sound annotation function (Sound memos up to 60 seconds in length can be recorded during replay)

Comments about an image can be easily added on the PowerShot G3 since sound memos up to 60 seconds in length can be recorded during replay.

Sound is recorded in WAVE format (mono).

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-Direct print function for Card Photo Printers CP-10/100 and Bubble Jet printers BJ 895PD, BJ 535PD and BJ F890PD

The direct printer function has been added to the PowerShot G3 so that high-picture-quality prints can be made easily by merely connecting the camera with the supplied cable to Canon’s CP-10 card photo printer, the L-size and postcard-size compatible CP-100 or a Bubble Jet printer (BJ 895PD/BJ 535PD/BJ F890PD).

All printing operations are controlled from the camera. When connected to the CP-100 or CP-10, selection of border or borderless prints and “cropping”, which allows the user to expand and print an area of the image, are also available. After selecting the cropping mode, the section denoted by the frame superimposed over the image displayed on the LCD monitor can be printed. The size of the frame can be adjusted in either 8 steps (when placed horizontally) or 5 steps (when placed vertically) with the zoom lever and the position can be moved with the cross-configured buttons.

Card prints include options for full-size label prints or 8 copies of the same image on one sticker sheet. When connected to a Bubble Jet printer, five paper sizes — L, 2L, postcard, A4 and credit card

— can be selected, and border, borderless, number of copies, indexing and cropping options can be specified for each.

	Furthermore, when the PowerShot G3 is combined with the
	BJ 895PD or BJ 535PD, which support Exif 2.2, optimal print	Photo 2–6 Cropping screen
	quality can be obtained automatically.

PowerShot G3

Figure 2–11 Direct Print Function

- Self-timer photography (selectable from 2 or 10 seconds)

The PowerShot G3 adds a 2-second setting to the previous 10-second setting for the self-timer function. The 2- second setting is useful as an alternative to an external release when using a tripod mount or to avoid camera shake.

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Figure 2–12 Comparison of top-section control sections and LCD panels

- Driver-less computer connections with Picture Transfer Protocol (PTP) support

Because the PowerShot G3 supports PTP, a standard protocol, driver-less image communications with computers are possible when combined with recent operating systems (Windows XP or Mac OS X (version 10.1)). Specifically, selecting PTP from the “Communication” setting on the camera menu, the following functions can be controlled from the computer by simply

connecting the camera. • View images in the camera

• Transfer images in the camera to the computer

• Delete images in the camera from the computer

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2–3 Operation Ease

- Four-times optical zoom finder with dioptric adjustment

The optical finder is a real-image-type four-times zoom finder constructed from 4 elements in 4 groups. The dioptric range of the eyepiece lens can be adjusted from -3dpt to +1dpt (-3m-1 to +1m-1) to provide an optimal viewing environment for all users.

- User interface makes a diverse set of functions easy to understand (electronic dial, independent mode dial, large-sized display panel)

Along with providing a new electronic dial on the PowerShot G3, the two-stage main dial/mode dial construction employed on the PowerShot G1 and G2 has been abandoned and each function has been made independent. In particular, the main dial separates the functions of the mode lever and OFF button, and the power on and shooting/replay selection function have been given* to the mode lever.

By redesigning the display panel for a clear layout of icons, comprehension and operability have been improved despite performing a diverse set of functions.

* Power is switched off with the OFF button.

<Upper operation part (PS G2)>

<Upper operation part (PS G3)>

<Upper LCD pannel (PS G2)>

<Upper LCD pannel (PS G3)>

-Change to shooting mode by pressing the shutter button (in replay mode)

While the PowerShot G3 in replay mode, users can change to shooting mode by pressing the shutter button halfway. Users won’t miss shutter chances thanks to this feature.

- USB interface accepts multipurpose connectors

The shape of the USB connector on the PowerShot G3 body has been changed to a standard “mini B” type (found on the PowerShot S30/S40). Superior versatility is gained as a result.

(PS G2)	(PS G3)

Photo 2–7 Comparison of digital connectors

- Independent white balance/exposure compensation controls and function button improve operability

The PowerShot G3 makes a great improvement in operability by assigning exposure compensation and white balance to independent buttons.

Also a new function button has been created. By pressing the function button and operating the cross-configured buttons, the following items can be selected and then set following the item’s prescribed procedure.

↑

↓

ISO speed

↑

photo↓effects

↑

↓

Bracketing

↑

Flash↓exposure compensation (strength setting)

↑

↓

Number of recording pixels

↑

↓

Figure 2–13 Rear-panel control section

- Manual focus adjustment with better usability

Although it is possible to adjust the focus manually while viewing the LCD monitor on the PowerShot G3, it is sometimes difficult to bring the subject into focus on the LCD monitor due to patterns and designs on the subject.

To improve this area, a new focusing arrangement has been made possible that makes use of the autofocus function. Specifically, a rough focus setting is made by rotating the electronic dial left and right. Next, pressing the set button while in this state detects the correct focus position by automatically scanning both in front and behind the current focus position.

Furthermore, the distance display switchover point of the MF lamp displayed on the LCD monitor has been changed from the previous 1 meter to 50 centimeters, thereby improving usability.

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- One-touch reset of all settings

The PowerShot G3 includes a function to return all user settings*1 made on the LCD monitor to their default conditions with one touch. Pressing the menu button continuously for five seconds brings up the reset dialog. Clicking OK executes the reset.*2

*1 Excluding settings for time, language and video output format

*2 Settings cannot be reset during a computer connection or when printing from the camera using the direct print function.

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2–4 System Accessories

- New wide converter and telephoto converter configurations

The optical accessories are being enhanced for the PowerShot G3 to respond to the diverse needs of users.

With the WC-DC58N Wide Converter, which converts the focal length of the master lens by a factor of about 0.7, the focal length after mounting becomes approximately 24.5 mm (wide-angle setting, 35 mm film equivalent). In the same way, the TC-DC58N Tele-converter converts the master lens by a factor of approximately 1.75, creating a focal length of about 245 mm (telephoto setting, 35 mm film equivalent). In addition, the existing 250D 58mm close-up lens permits macro-mode photography in the telephoto setting (Approx. 10cm), making a maximum of 37 by 27 mm area photograph possible. WC-DC58N and TC-DC58N for PowerShot G3 are not able to use on the PowerShot G2/G1. And WC-DC58 and TC-DC58 for PowerShot G2/G1 are not able to use on the PowerShot G3. *1

When these conversion lenses are attached, however, using the optical finder will cause an eclipse to form if not in the wide-angle setting with the wide-angle conversion lens or not in the telephoto setting with the telephoto conversion lens.

*1 Our expected performance can’t be obtained.

*The LA-DC58B conversion lens adapter sold separately is required to mount the WC-DC58N, TC-DC58N and 250D 58 mm.

Photo 2–8 TC-DC58N Tele-converter

Photo 2–9 WC-DC58N Wide Converter

Photo 2–10 LA-DC58B Conversion Lens Adapter

- New fast image storage CF card (256 MB)

A new high-capacity FC-256MH CF card*1 with reduced write times has been configured to handle long continuous storage*2 of moving images. The capacity of the card is 256 MB.

*1 Not available in USA market

*2 The long continuous storage of movies (three minutes) is available on the PowerShot G3 for conventional CF cards as well.

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- Support for EOS-type EX Speedlites (including the MT-24EX Macro Twin Lite)

The PowerShot G3 makes it possible to use the
MT-24EX* Macro Twin Lite for macro photography
in addition to the EX Speedlites (including the
MR-14EX Macro Ring Lite) developed for use with
EOS cameras. This flash makes delicate light
distribution possible in the macro mode.	Photo 2–11 MT-24EX Macro Twin Lite

Table 2–4 lists the EX Speedlite functions and other systems available on the PowerShot G1, G2 and G3.

Flash function & system		PS G1	PS G2	PS G3	Remarks
Automatic control		O	O	O	Set E-TTL mode with 550EX
High speed sync.					Maximum syncronized speed of 1/250s
FE lock		O	O	O	Exclude for manual shooting mode
Flash exposure compensation*1	550EX	O	O	O
	MR-14EX		O	O
	MT-24EX			O
Fill flash		O	O	O
Balanced flash exposure		O	O	O	ON-OFF is available of PS G3
FEB
Stroboscopic flash
Second-curtain sync.				O	Internal flash is also available with PS G3
Bounce flash
Manual flash		O	O	O
Manual flash control				O
Modeling flash
Automatic zoom		O	O	O	Exclude for 220EX/MR-14EX/MT-24EX
Off-camera shoe code 2		O	O	O
ST-E2 ( Transmitter)				O *2

*1: Full exposure is set when the PS G1 is in the manual shooting mode.

In the manual shooting mode on the PS G2 and PS G3, the default setting is 2 stops down from full exposure, but this value can be set in one-third stop intervals over a range of ±2 stops using the camera user interface.

Using the flash user interface, the flash strength can be set in one-third stop intervals over a range of ±3 stops in the same way.

However, +2 stops or greater reaches full exposure.

*2: When using of ST-E2 both the PS G3 and Speed-lite are set in manual mode, the flash doesn’t flash. Items marked with X in the table above may appear to work, but there is no guarantee that the specified exposure accuracy will be obtained.

Table 2–4 List of EX Speedlite functions and other systems available on the PS G1, G2 and G3

- Various Speedlite accessories (such as transmitters and camera shoe cord 2) can be used

The PowerShot G3 can utilize accessories developed for use with Speedlites such as off-camera shoe cord 2 and so on.

It also supports the ST-E2 Speedlite Transmitter.

Photo 2–12 ST-E2 Speedlite Transmitter

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2–5 Application Softwares

- Full featured application software

Figure 2–14 illustrates the general organization of the application software bundled with the PowerShot G3. Tables 2–5 and 2–6 list the content of each CD-ROM disk.

Mail

			PhotoStitch
			Composition
		ZoomBrowser	File Viewer Utility
			Development for
		Image import
			RAW image
	RemoteCapture	Image management
			PhotoRecord
	Remote controlled image capturing

	(ImageBrowser)	Printing
		PhotoStudio/VideoImpression
		Processing & Editing

Figure 2–14 Organization of bundled applications

		Windows	Macintosh
	Image management & display	ZoomBrowser EX 4.0	ImageBrowser 2.7
	Prints for arranged images	PhotoRecord 1.6
	Composition of images	PhotoStitch 3.1	PhotoStitch 3.1
	Remote controlled image capturing	RemoteCapture 2.6	RemoteCapture 2.6
	& export
	Camera driver	TWAIN Driver 5.0	USB Mounter1.8
		WIA Driver 5.0
	Development for RAW image	File Viewer Utility 1.0	File Viewer Utility 1.0
	Movie replay	Apple QuickTime5.0	-
	Printer driver	CP-100/10 Printer Driver 2.1	CP-100/10 Printer Driver 2.1
	for Printer driver's manual	Adobe Acrobat Reader 4.0	Adobe Acrobat Reader 4.0

Table 2–5 Bundled software content 1

	Windows	Macintosh
Image processing & editing	Adobe Photoshop LE 5.0	Adobe Photoshop LE 5.0

Table 2–6 Bundled software content 2

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ZoomBrowser EX 4.0 (Win) made more ergonomic

The ZoomBrowser EX 4.0 makes a vast improvement in usability from previous ZoomBrowser EX versions, featuring an updated user interface. (The previous ImageBrowser Ver. 2.7 is bundled for use with Macintosh computers.)

Figure 2–15 Main ZoomBrowser EX screen

Figure 2–16 Image listing in ZoomBrowser EX (Japanese version)

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