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This means the crop factor for X system lenses (based on diagonal angle of view) compared to "full-frame" 135 is 0.79; for example, a X system lens with a focal length of 65 mm would have the equivalent coverage of a lens with a focal length of approximately 50 mm on a "full-frame" camera. X system lenses are designed by Hasselblad and ...
The modern anamorphic format has an aspect ratio of 2.39:1, meaning the (projected) picture's width is 2.39 times its height, (this is sometimes approximated to 2.4:1). The older Academy format of Anamorphic widescreen was a response to a shortcoming in the non-anamorphic spherical (a.k.a. "flat") widescreen format.
Modern highly corrected zoom lenses with fifteen, twenty or more elements would not be possible without multicoating. [218] [219] The transmission efficiency of a modern multicoated lens surface is about 99.7% or better. [220] Then and today, Pentax's SMC coatings were regarded as the most efficient at reducing flare and maintaining contrast. [221]
The Carl Zeiss Planar 50mm f/0.7 is one of the largest relative aperture (fastest) lenses in the history of photography. [1] The lens was designed and made specifically for the NASA Apollo lunar program to capture the far side of the Moon in 1966. [2][3][better source needed][4] Stanley Kubrick used these lenses when shooting his film Barry ...
Glasses, also known as eyeglasses and spectacles, are vision eyewear with clear or tinted lenses mounted in a frame that holds them in front of a person's eyes, typically utilizing a bridge over the nose and hinged arms, known as temples or temple pieces that rest over the ears. Man with glasses. Glasses are typically used for vision correction ...
Frames can be made to hold the lenses in several different ways. There are three common styles: full frame, half frame, and frameless. Full frame glasses have the frame go all around the lenses. Half frames go around only half the lens; typically the frames attach to the top of the lenses and on the side near the top.
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