Canon 70-300mm f4-5.6 IS USM is an Auto Focus (AF) Telephoto Zoom
lens with 35mm FF max sensor coverage and it is designed to be used with Canon EF mount cameras.
Lenses in Canon EF Mount with Same Focal and Aperture Range
Canon 70-300mm f4-5.6 IS USM is compatible with cameras that have Canon EF
lens mount. Some of the latest released cameras with Canon EF lens mount are Canon 1D X III
, Canon 6D MII
and Canon 5D MIV
Max sensor coverage of Canon 70-300mm f4-5.6 IS USM is 35mm FF
Canon 70-300mm f4-5.6 IS USM has a focal range of 70-300mm and 4.3X zoom ratio. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 112 - 480mm.
Optical Image Stabilization
Canon 70-300mm f4-5.6 IS USM features an optical image stabilization system which helps to reduce the blur that occurs due to shaking during hand-held shooting.
Canon 70-300mm f4-5.6 IS USM 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.
Canon 70-300mm f4-5.6 IS USM 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
Canon 70-300mm f4-5.6 IS USM has a Max Magnification Ratio of 0.26x
and has a minimum focusing distance of 1.5m
Canon 70-300mm f4-5.6 IS USM is a variable aperture lens with a max aperture of f4 and a minimum aperture of f32 at 70mm, and a max aperture of f5.6 and minimum aperture of f45 at 300mm .
Canon 70-300mm f4-5.6 IS USM's optical formula consists of 15 elements in 10 groups.