Tamron 17-50mm f2.8 XR II LD is an Auto Focus (AF)
Standard Zoom lens with APS-C / DX max sensor coverage and it is designed to be used with Pentax KAF mount cameras.
Lenses in Pentax KAF Mount with Same Focal and Aperture Range
Lens Mount
Tamron 17-50mm f2.8 XR II LD is compatible with cameras that have
Pentax KAF lens mount. Some of the latest released cameras with Pentax KAF lens mount are
Pentax K-3 III,
Pentax KP and
Pentax K-70.
Sensor Coverage
Max sensor coverage of Tamron 17-50mm f2.8 XR II LD is
APS-C / DX.
Focal Range
Tamron 17-50mm f2.8 XR II LD has a focal range of 17-50mm and 2.9X zoom ratio.
Optical Image Stabilization
Tamron 17-50mm f2.8 XR II LD 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
Tamron 17-50mm f2.8 XR II LD is available in Black color.
Zoom Method
Tamron 17-50mm f2.8 XR II LD 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.
Zoom Lock
Tamron 17-50mm f2.8 XR II LD has a
Zoom lock feature which eliminates Zoom creep where focal length of the lens changes with gravity when it's held downwards or upwards.
Maximum Magnification Ratio
Tamron 17-50mm f2.8 XR II LD has a Max Magnification Ratio of
0.22x and has a minimum focusing distance of
0.27m.
Aperture
Tamron 17-50mm f2.8 XR II LD is a fixed aperture lens with a constant max aperture of f2.8 from 17mm all the way to the 50mm .
Optical Formula
Tamron 17-50mm f2.8 XR II LD's optical formula consists of 16 elements in 13 groups.
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