By Junichi Date / CAPA asia
Back-illuminated full-frame image sensor greatly improves light collection effociency and prevents color cast at the peripheral area
The Super Wide-Heliar is engraved with distance indicator and depth of field scales, so it is obvious at a glance what aperture to use, and which distance (in meters) should be focused on to enable coverage up to infinity. The lens is so compact, its hard to believe it’s a 15mm ultra-wide-angle lens, and it’s ideal for snap photography.
The Super Wide-Heliar 15mm F4.5 II has an ultra-wide-angle of 15mm, and filter diameter of only 52mm, so a key feature is compactness like the FE35mm F2.8ZA, even when a mount adapter is attached. The rear lens projects out far from the mount surface. This sort of lens with short back focus can be made close to a symmetrical optical system, even with an ultra-wide-angle or wide-angle lens, and this is advantageous for achieving greater compactness without losing optical performance.
■ Cosina VM-E Close Focus Adapter
This mount adapter is for Leica M and Voigtländer VM lenses. It features a helicoid mechanism with a 4mm stroke. Most lenses for rangefinders have a long minimum focus distance, and this helicoid mechanism conveniently allows shortening of that distance. A lock engages at infinity, so there are no worries about the helicoid mechanism coming out.
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α7R II with back-illuminated full-frame image sensor
Higher resolution, sensitivity, and readout speed
As the world’s first* 35mm full-frame image sensor with back-illuminated structure, this 42.4-megapixel CMOS sensor enhances light collection efficiency, expands circuitry scale, and, with the help of a quick-transmission copper wiring layer, outputs data about 3.5 times faster**, while minimizing image noise to reveal fine details in every picture.
*Among digital cameras with a full-frame image sensor. As of June 2015 press release, based on Sony research.
**In comparison with the α7R.
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