Revolutionary design
Welcome to an exciting new chapter in PENTAX SLR
history. Featuring shake reduction for dramatic results
with slower shutter speeds and a name that reflects
our vast heritage of K-mount lens compatibility, the
PENTAX K100D delivers an abundance of advanced,
user-friendly features in an affordable digital SLR
body. Compatible with any PENTAX SLR lens ever
produced,* the K100D is the kind of camera that makes
history. Picture a large 2.5 inch LCD monitor with
210,000 pixel resolution. A friendly Mode Dial offering
Auto Picture and Picture modes as well as new Scene modes
makes photography even simpler. The 6.1 megapixel CCD,
11-point auto focus mechanism, and sophisticated 16-segment
multi-pattern metering delivers outstanding image reproduction, while the bright, high-precision penta-mirror viewfinder
features a 96 percent field of view with 0.85X magnification.
All these features combine in a compact design with a
high-rigidity stainless-steel chassis that is built to last.
*With adapter for screw mount and 645/67 lenses.
PENTAX S hake Reduc tion
The PENTAX K100D digital SLR incorporates a unique
shake reduction feature that helps deliver sharp, blur-free,
handheld shots with any PENTAX SLR lens. This is particularly helpful in situations where camera shake is an issue,
such as with telephoto lenses, indoors without a flash, or
other low light conditions such as at dawn, dusk or at night.
The PENTAX Shake Reduction (SR) feature is an electromagnetically controlled system built into the body to detect
handheld camera shake and compensates by moving a free
floating image sensor. Unlike other DSLR optical anti-shake
systems, this SR system delivers shake reduction with all
PENTAX SLR lenses ever manufactured without requiring a
special series of bulky, expensive optics.
Over 30 patents have been filed for this SR system, which
uses a ball-bearing-mounted oscillator unit with four
electromagnets that position the free-floating image sensor.
Angular velocity sensors detect camera movement and relay
the amount of compensation necessary to the electromagnets
that move the sensor to compensate for any shake.
As a result, photographers can capture sharp images at a
shutter speed that is 2 to 3.5 stops slower (e.g. 1/15 sec instead of 1/60 sec with a standard lens) than would otherwise
be possible. The SR system provides a crucial advantage
when shooting handheld with telephoto or tele-zoom lenses,
at macro distances, or any other situation that magnifies the
effects of camera shake. The SR system also helps considerably when taking non-flash pictures indoors or at dusk or
other low light situations without using a tripod.
Based on a free-floating sensor design, PENTAX SR is superior
to other sensor-moving systems because it uses no guide rails,
allowing the sensor to oscillate at a quicker response time.
Inside the shake reduction unit
Inside the innovative PENTAX Shake Reduction
mechanism, two angular velocity sensors are used
to detect the amount and direction of camera shake.
The data accumulated by these sensors is transmitted to the camera’s CPU to instantly calculate the
vertical and horizontal shift levels required to compensate for camera shake. The image sensor is then
shifted at the optimum levels using magnetic force
generated by the permanent magnets on the front
plate and the electrical magnets on the center plate.
Since this mechanism does not require a mechanical guiding device, it is free of power loss for quick
response and speedy operation. The image sensor is
firmly supported by the three ball bearings installed
on the back plate for pinpoint positioning.
Electrical magnet
Permanent magnets
Center plate
Front plate
Position sensor
Image sensor
Back plate
Position support
ball bearing
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