With regard to film bodies before digital bodies were available to most normal consumers. The last time they officially mentioned it was Apparently Nikon has never definitively stated which is correct with regard to digital cameras. There are even some who have done test that seem to indicate some Nikon digital bodies are stepless in automatic exposure modes and other Nikon digital bodies are not. There are some who contend that Nikon digital cameras continue this practice, while others contend that they do not. If the camera was set to 'A' mode, the shutter speed the camera actually used was stepless to give the exposure indicated by the reading of the light meter, but the viewfinder displayed the shutter speed to the nearest whole stop. ² In the late film era, most Nikon 35mm cameras with automatic exposure modes calculated exposure steplessly. The primary reasons are a) To allow for thermal expansion/contraction of the LD glass, which is more sensitive to temperature variations than more typical optical glass, that will alter the exact position of infinity focus and b) to prevent the AF motor from bumping against a hard stop when attempting to focus the lens at or near infinity. ¹ Most zoom lenses, and even many prime lenses with AF and LD glass, do not have a hard focus stop at infinity. The manual focus ring, while mechanically connected to the focus elements of the lens, has a short throw that is devoted mostly to very close subject distances. It is a lens designed to be used on still camera bodies with the aperture controlled by the camera, not by a stepless aperture control ring. This is not a "cinema" lens and does not offer the features many cinema lenses are expected to have. DPReview says the focus throw is 110°.įrom your questions, it sounds like you might be interested in this lens for shooting video.
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