Pentax 17-70mm F4.0 AL SDM is an Auto Focus (AF)
Standard Zoom lens with APS-C / DX max sensor coverage and it is designed to be used with Pentax KAF3 mount cameras.
Lens Mount
Pentax 17-70mm F4.0 AL SDM is compatible with cameras that have
Pentax KAF3 lens mount. Some of the latest released cameras with Pentax KAF3 lens mount are
,
and
.
Sensor Coverage
Max sensor coverage of Pentax 17-70mm F4.0 AL SDM is
APS-C / DX.
Focal Range
Pentax 17-70mm F4.0 AL SDM has a focal range of 17-70mm and 4.1X zoom ratio.
Optical Image Stabilization
Pentax 17-70mm F4.0 AL SDM doesn't have an optical image stabilization system so the only option to stabilize the image taken with this lens is to mount on a camera body with IBIS (sensor based In-body image stabilization).
Body Colour
Pentax 17-70mm F4.0 AL SDM is available in Black color.
Zoom Method
Pentax 17-70mm F4.0 AL SDM features
Rotary (extending) zoom method where the length of the lens changes as you zoom in or out. This makes it possible to design the lens with a smaller minimum length ( generally when it is zoomed out) compared to internal zoom lenses. The disadvantages of this design are being harder to seal against dust and moisture, weight balance shifting while zooming and zoom creep in certain lenses.
Aperture
Pentax 17-70mm F4.0 AL SDM is a fixed aperture lens with a constant max aperture of f4 from 17mm all the way to the 70mm .
Optical Formula
Pentax 17-70mm F4.0 AL SDM's optical formula consists of 17 elements in 12 groups.