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EXCERPT page containing first few paragraphs. 2021-10-22 12:44:41

Sony A7R

A7R Shutter Vibration at 280mm

See About Shutter Vibration.

An identical series was shot with the 24-megapixel Sony A7, which has an electronic first curtain—zero vibration.

Tripod mounting

The Leica 280mm f/4 APO-Telyt-R has the most robust tripod foot of any ~300mm range lens on the market (though it itself is discontinued). And so we might expect minimal vibration issues. But the issue really revolved around the length of the 'rig' and the way the vibration propagates through. A robust tripod foot is a plus for several reasons, but it does not eliminate shutter vibration.

The tripod was placed on a wooden floor, the head locked down and precise focus was achieved. Shots at f/4 and f/5.6, peak apertures. A variable light source was used to achieve different shutter speeds without changing aperture.

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Special emphasis is placed on Sony full-frame, including Sony lenses and the high performance Zeiss Batis and Zeiss Loxia lenses plus Rokinon/Samyang and others. Fujifilm X, Olympus and Panasonic M4/3, Sigma dp Merrill and dp/sd Quattro are also covered in depth. Years in the making, it offers a wealth of material for choosing and using a mirrorless camera.

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