Tamron AF 28-80mm f3.5-5.6 is an Auto Focus (AF)
Standard Zoom lens with 35mm FF max sensor coverage and it is designed to be used with Pentax KAF mount cameras.
Lens Mount
Tamron AF 28-80mm f3.5-5.6 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 K-1 II and
Pentax KP.
Sensor Coverage
Max sensor coverage of Tamron AF 28-80mm f3.5-5.6 is
35mm FF.
Focal Range
Tamron AF 28-80mm f3.5-5.6 has a focal range of 28-80mm and 2.9X zoom ratio. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 42 - 120mm.
Optical Image Stabilization
Tamron AF 28-80mm f3.5-5.6 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 AF 28-80mm f3.5-5.6 is available in Black color.
Zoom Method
Tamron AF 28-80mm f3.5-5.6 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
Tamron AF 28-80mm f3.5-5.6 is a variable aperture lens with a max aperture of f3.5 and a minimum aperture of f22 at 28mm, and a max aperture of f5.6 and minimum aperture of f22 at 80mm .
Optical Formula
Tamron AF 28-80mm f3.5-5.6's optical formula consists of 7 elements in 7 groups.