Sigma 70-300mm F4-5.6 DG OS is a Variable aperture Auto Focus (AF) Telephoto Zoom
lens with Optical Image stabilization and 35mm FF max sensor coverage, and it is designed to be used with Pentax KAF3 mount cameras.
Lenses in Pentax KAF3 Mount with Same Focal and Aperture Range
Sigma 70-300mm F4-5.6 DG OS is compatible with cameras that have Pentax KAF3 lens mount. Some of the latest released cameras that are compatible with the Pentax KAF3 lenses are Pentax K-3 III, Pentax K-1 II and Pentax KP.
Sigma 70-300mm F4-5.6 DG OS is also available in Canon EF , Nikon F (FX), Sony Alpha and Sigma SA mounts.
Size, Weight and Filter Thread
Size and weight is a very important decision factor when searching for your next lens. Sigma 70-300mm F4-5.6 DG OS has a maximum diameter of 77mm and total length of 126mm when not extended .
Sigma 70-300mm F4-5.6 DG OS has a filter thread of 58mm.
Sigma 70-300mm F4-5.6 DG OS has a focal range of 70-300mm and 4.3X zoom ratio. When it is mounted on an APS-C sensor camera with 1.5x crop, it provides an 35mm (FF) equivalent of 105 - 450mm.
Optical Image Stabilization
Sigma 70-300mm F4-5.6 DG OS features an optical image stabilization system which helps to reduce the blur that occurs due to shaking during hand-held shooting.
Sigma 70-300mm F4-5.6 DG OS 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.
Maximum Magnification Ratio
Sigma 70-300mm F4-5.6 DG OS has a Max Magnification Ratio of 0.26x and has a minimum focusing distance of 1.5m. For a non-macro lens, the 0.26x is considered a high magnification and will come handy for close-up shots.
Sigma 70-300mm F4-5.6 DG OS is a variable aperture lens with a max aperture of f4 and a minimum aperture of f22 at 70mm, and a max aperture of f5.6 and minimum aperture of f32 at 300mm .
Sigma 70-300mm F4-5.6 DG OS's optical formula consists of 16 elements in 11 groups . Special elements used in this design is 1 SLD glass element.
Sigma 70-300mm F4-5.6 DG OS comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.
Popular Comparisons of Sigma 70-300mm F4-5.6 DG OS
Here is the eight most popular comparisons of Sigma 70-300mm F4-5.6 DG OS amongst Camera Decision readers.