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Lens hoods are often designed to fit onto the matching lens facing either forward, for normal use, or backwards, so that the hood may be stored with the lens without occupying much additional space.
For wide angle lenses, the length of the hood cannot be as long as those for telephoto lenses, as a longer hood would enter the wider field of view of the lens. Lens hoods are more prominent in long focus lenses because they have a smaller viewing angle than that of wide-angle lenses. This allows the lens hood to block stray light with the higher portions of the lens hood, while allowing more light into the corners of the image through the lowered portions of the hood. The geometry of the lens hood can vary from a plain cylindrical or conical section to a more complex shape, sometimes called a petal, tulip, or flower hood. This stray light often comes from very bright light sources, such as the sun, bright studio lights, or a bright white background.
Flare occurs when stray light strikes the front element of a lens and then bounces around within the lens. Zenzanon-S 80mm F2.8: standard lens with well-balanced superior performance and a fast F2.8 lens speed.Ī lens hood or lens shade is a device used on the end of a lens to block the sun or other light source in order to prevent glare and lens flare. And, the six electrical terminals on the lens, which match those on the body mount, show that the Zenzanon-S lenses incorporate a revolutionary electronic control system. The lens is removed by simply depressing the release button and rotating the lens. The lens is attached by simply rotating it until locked into place. Their natural color reproduction and superb color balance are widely acclaimed by professionals. Zenzanon-S interchangeable lenses, from 40 mm to 500 mm, are noted for their great resolving power and superior image quality.
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Zenzanon-S Series Lenses - With 6 Gold-plated Terminals
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There is very stable performance at all shutter speeds from 8 to 1/ 500 sec., which are electronically-controlled plus a mechanically-controlled 1/500 second, without image distortion because the leaf shutter opens fully at all speeds. The lens shutter system has been developed jointly by Seiko and Bronica, based on the latest "mechatronic" (mechanical-electronic) technology, and provides professionals with a highly accurate shutter control system in which the leaf shutter is incorporated in each lens and the electronic control circuit is built into the camera body, with automatic coupling upon attachment.
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This makes it the ideal tool for daylight flash fill-in shots, as well as for shooting a fast-moving model in the studio, especially as there is a free choice of speeds and apertures for matching the mood. synching speeds, the lens shutter synches at all shutter speeds, up to the fastest 1/500 sec., because the leaf shutter opens fully at all speeds. Differing from the focal plane shutter, which is limited to 1/60 to 1/125 sec. The electronic flash is a very important tool for the modern photographer because of its extremely short flash duration and fast recycling time, and the lens shutter is the ideal medium for it.
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And, automatic bellows attachment, close up lenses, filters, professional lens hood, etc., are also available, and are very effective when used with the Zenzanon-S lenses.Įlectronic-Control Lens Shutter, with Synching at All Speeds up to 1/ 500 Second Zenzanon lenses are widely recognized for sharp resolving power and natural color balance and available from super wide 40mm to telephoto 500mm, with a 2X tele-converter. The Zenzanon-S lenses for the Bronica SQ-A Series have all been newly designed and are very compactly constructed, in spite of the lens shutter system, with grade-up in optical performance, too.
*) Sources of data: Zenza Bronica SQ / SQ-A booklet
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