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A welding helmet in use. A welding helmet is a piece of personal protective equipment used by welders to protect the user from concentrated light and flying particles. . Different welding processes need stronger lens shades with auto-darkening filters, while goggles suffice for
The M.Zuiko Digital 17 mm f/2.8 is a wide-angle, pancake-style prime lens by Olympus Corporation, for the Micro Four Thirds System. It is sold in a kit with the Olympus PEN E-P1 camera body and available separately. The optical scheme has 7 lenses in four groups; two of these lenses are aspherical.
A body-cap lens is an extreme type of pancake lens that is designed to both protect the camera internals as a body cap normally would, yet still allow the user to take photos. These lenses are manual focus only and generally have no more than a couple of optical lens elements, no image correcting elements, a very-slow fixed aperture, an ...
Pages in category "Pancake lenses" The following 15 pages are in this category, out of 15 total. This list may not reflect recent changes. 0–9. Canon EF 40mm lens; F.
The Panasonic Lumix G 20mm F1.7 lens is a pancake-style prime lens for Micro Four Thirds system cameras. In the Micro Four Thirds format, it is slightly wider than normal. It was the prime-lens option available with the GF1. The lens is "focus by wire"- the focusing ring sends commands, while the actual actuation is via a motor, even for manual ...
A photochromic eyeglass lens, part of the lens darkened after exposure to sunlight while the other part remained covered. A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation. In the absence of activating light, the lenses return to their clear state.
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