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Phase-detection autofocus "sees" through window glasses without problems and is much more accurate, but it does not work in low-light conditions or on surfaces without contrasts or with repeating patterns. A very common example of combined usage is the phase-detection auto-focus system used in single-lens reflex cameras since the 1985s. The ...
On almost all DSLRs that offer live preview via the primary sensor, the phase-detection autofocus system does not work in the live preview mode, and the DSLR switches to a slower contrast system commonly found in point-and-shoot cameras. While even phase detection autofocus requires contrast in the scene, strict contrast-detection autofocus is ...
The following list of Nikon F-mount lenses with integrated autofocus motor includes only Nikon F-mount lenses which fully autofocus in all modes of all Nikon F-mount digital single-lens reflex cameras with and also without an autofocus motor. [1] Cameras lacking an integrated autofocus motor (often called screw drive) are the Nikon D40, D40X ...
Number of Canon EF lenses sold over time (red), compared with Nikon F mount lenses (blue) The EF mount replaces its predecessor, the FD mount.The standard autofocus lens mounting technology of the time used a motor in the camera body to drive the mechanics of the focus helicoid in the lens by using a transfer lever.
Varifocal lenses are also used in many modern autofocus cameras as the lenses are cheaper and simpler to construct and the autofocus can take care of the re-focussing requirements. Many modern zoom lenses are now confocal, meaning that the focus is maintained throughout the zoom range. Because of the need to operate over a range of focal ...
A feature of the SX-70 film packs was a built-in battery to power the camera motors and exposure control, ensuring that a charged battery would always be available as long as film was in the camera. The "Polapulse" battery was configured as a 6 volt thin flat battery, and used zinc chloride chemistry to provide for the high pulse demand of the ...
Some autofocus lenses with a focus ring (such as those on most consumer and prosumer camcorders) are not "true" manual focus lenses—meaning that turning the ring does not directly adjust the elements inside the lens, but rather actuates the internal camera electronics that adjust the focus point. Such lenses are sometimes called "focus by ...
This was an autofocus version of the Konica C35 Automatic camera. It featured a fixed-aperture Hexanon 38 mm f/2.8 autofocus lens with a leaf shutter, a built-in electronic flash, and an automatic exposure system to select the appropriate shutter speed. The film advance was mechanical.
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