Sigma 571 DATASHEET

ENGLISH
Thank you very much for purchasing a Sigma Lens. In order to get the maximum performance and enjoyment out of your Sigma lens, please read this instruction booklet thoroughly before you start to use the lens.
DESCRIPTION OF THE PARTS (fig.1)
Filter Attachment Thread Focus Mode Switch Focus Ring Zoom Ring Distance Scale Mount Depth of Field Read Out Index Lens Hood Focus Index Line
NIKON AF TYPE CAMERAS
This lens functions in the sa me way as a G Type auto-focus Nikon lens (without an aperture ring). Functions may be restricted depending on the lens/camera combination. For more details, please refer to the camera’s instruction manual.
PENTAX AF TYPE CAMERAS
This Lens functions same as a FAJ Type (type without Aperture) auto-focus Pentax lens. Depending on the combination with camera some restrictions with its functions may result. For more details, please refer to instruction manual of the camera in use etc.
ATTACHING TO CAMERA BODY
When this lens is attached to the camera body it will automatically function in the same way as your normal lens. Please refer to the instruction booklet for your camera body.
On the lens mount surface, there are a number of couplers and
electrical contacts. Please keep them clean to ensure proper connection. To avoid damaging the lens, be especially sure to place the lens with its front end down while changing the lens.
Many accessories such as rear mounted teleconverters, extension
tubes, etc., are specially made for designated lenses. Before you purchase such accessories, please check your Sigma lens to determine that it is compatible and that the accessories will function properly with it.
SETTING THE EXPOSURE MODE
The sigma lens functions automatically after mounting to your camera. Please, refer to the camera instruction book.
FOCUSING AND ZOOMING
This lens features Sigma’s built-in Hyper Sonic Motor (HSM). The HSM enables quick and quiet autofocusing.
SIGMA AF and CANON AF For autofocus operation, set the focus mode switch on the lens to the “AF” position (fig.2). If you wish to focus manually, set the focus mode switch on the lens to the “M” position. You can adjust the focus by turning the focus ring.
NIKON AF , PENTAX AF and SONY
For autofocus operation, set the camera to AF mode and set the focus mode switch on the lens to the “AF” position (fig.2). If you wish to focus manually, set the focus mode switch on the lens to the “M” position. You can adjust the focus by turning the focus ring.
Please refer to camera’s instruction manual for details on changing the
camera’s focusing mode.
For Nikon, Pentax and Sony mounts, it is only possible to use AF with
camera bodies which support motors driven by ultrasonic waves such as HSM. AF will not function if the camera body does not support this type of motor.
This lens also permits manual focusing even in the autofocus mode.
With the camera set to the One-Shot AF (AF-S) mode, it is possible to
manually override the autofocus while the shutter release button is pressed halfway.
When operating this lens in manual focus mode, it is recommended that
correct focus be confirmed visually in the viewfinder rather than relying on the distance scale. This is due to possible focus shift resulting from extreme changes in temperature which cause various components in the lens to expand and contract . Special allowance is made for this at the infinity setting.
Zooming
Rotate the Rubber grip on the zoom ring to the desired position.
DEPTH OF FIELD SCALE
The depth of field scale helps you to check the depth of field (the zone of sharpness) of your compos ition. For example in figure (3), the depth of field zone is shown when the aperture F4 is used.
The depth of fiel d sc ale can be use d at a focal le ngt h o f 24mm only.
LENS HOOD
A bayonet type detachable hood is provided with the lens. This lens hood helps to prevent flare and ghosted images caused by bright illumination from outside the picture area. Attach the hood and turn clockwise until it stops rotation. (fig.4)
When taking photographs using the built-in flash, it is advisable to
remove the lens hood so as to avoid cutting off any of the flash output, which could cause a shadow in the picture.
In order to place the lens and hood into the storage case, you must first
remove the hood, then replace it on the lens in the reverse position. (fig.5)
FILTER
Only one filter should be used at the time. Two or more filters and/or
special thicker filters, like a polarizing filter, may cause vignetting.
When using a polarizing filter with AF camera, use the “circular” type.
BASIC CARE AND STORAGE
Avoid any shocks or exposure to extreme high or low tempe ratures or to humidity.
For extended storage, choose a cool and dry place, preferably with
good ventilation. To avoid damage to the lens coating, keep away from mothballs or naphthalene gas.
Do not use thinner, benzine or other organic cleaning agents to remove
dirt or finger prints from the lens elements. Clean by using a soft, moistened lens cloth or lens tissue.
This lens is not waterproof. When you use the lens in the rai n or near
water, keep it from getting wet. It is often impractical to repair the internal mechanism, lens elements and electric components damaged by water.
Sudden temperature changes may cause condensation or fog to appear
on the surface of the lens. When entering a warm room from the cold outdoors, it is advisable to keep the lens in the case until the temperature of the lens approaches room tempe rat ure.
TECHNICAL SPECIFICATIONS
Lens construction 12 – 14 Angle of View 84.1 ~ 34.3° Minimum Aperture 22 Minimum Focusing Distance 38cm (1.25 ft) Magnification 1:5.3 Filter Size 82mm Dimensions Dia.×Length 88.6×94.7mm (3.49×3.73 in) Weight 790g (27.9 oz)
Dimensions and weight include the SIGMA mount.
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