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The depth of field, and thus hyperfocal distance, changes with the focal length as well as the f-stop. This lens is set to the hyperfocal distance for f /32 at a focal length of 100 mm. In optics and photography, hyperfocal distance is a distance from a lens beyond which all objects can be brought into an "acceptable" focus.
The Sony FE 70-200mm F4.0 G OSS is a full-frame constant maximum aperture, telephoto zoom lens for the Sony E-mount, announced by Sony in 2013. [1] [2]The 70-200mm F4.0 G lens is popular among weight-sensitive landscape photographers and hobbyists who want G-lens quality without spending thousands of dollars on a heavier, faster aperture telephoto lens.
The Canon EF-S 10–22mm f / 3.5–4.5 USM lens is a wide to ultra-wide angle zoom lens for Canon digital single-lens reflex cameras with a Canon EF-S lens mount. [2] The field of view has a 35 mm equivalent focal length of 16–35mm, which is analogous to the EF 16–35mm f / 2.8L on a full-frame camera. The 10–22mm is an internal focusing lens.
DxO Labs claims that P-MP is a more accurate and relevant value for photographers to consider when weighing-up camera sharpness. [ 2 ] [ 1 ] As of March 2017, the "Canon EF 300mm f/2.8L IS II USM" lens mounted on a "Canon EOS 5Ds R" has the highest measured P-Mpix value in the DxO Labs lens database, a value of 44.7. [ 3 ]
There’s very little to choose between the fabulous centre-sharpness of this lens and Canon’s new RF 35mm, although the latter wins out for sharpness away from the central region of the frame.
The term critical sharpness is sometimes heard (by analogy with critical focus) for "obtaining maximal optical resolution", as limited by the sensor/film and lens, and in practice means minimizing camera shake – using a tripod or alternative support, mirror lock-up, a cable release or timer, image stabilizing lenses – and optimal aperture ...
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