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While the "(D)" designation is used on the box and in the documentation, the lenses just feature a "D" instead. Requires 8 lens contacts; lenses with only 5 contacts cannot support this feature. DT "Digital Technology", lenses for cameras with APS-C (or Super-35mm) size sensors, only. DT lenses will not fully illuminate the sensor/film area of ...
In the end, Maintenaz's invention would be fixed between Essel's bifocal lens, the Diachrolux, and its trifocal lens, the Trilux. Without much brainstorming, Maintenaz's progressive lens was given a name following suit with the other premium products: Varilux. [7] The lens was launched officially in May 1959 at the Hotel Lutetia in Paris, France.
With any other lenses the camera's electronic rangefinder (which indicates if the subject inside the selected focus point is in focus or not) can be used to manually adjust focus. [6] [7] It can mount unmodified A-lenses (also called Non-AI, Pre-AI or F-type) with support of the electronic rangefinder and without metering. [8]
Early embodiment of contact lens display, Canadian patent application 2280022, 1999 July 28th. A bionic contact lens is a proposed device that could provide a virtual display that could have a variety of uses from assisting the visually impaired to video gaming, as claimed by the manufacturers and developers. [1]
Auto-focus available for all "screw-drive" lenses, but no power contacts for power zoom or the later lenses with built-in focus motors. Aperture and shutter information visible in the viewfinder. Focus confirmation in the viewfinder for all lenses of f/5.6 or wider. 17 Custom Functions to help configure the camera to individual preferences.
The main differences over the Pentax K-30 include a more traditional body design, 120 available body color combinations, higher max ISO range (up to 51 200), compatibility with Eye-Fi cards and an improved kit lens (Pentax K-30 included the DA L 18-55mm lens, while Pentax K-50 bundles a water-resistant version, the DA L 18-55mm WR, both with ...
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