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Sony NEX-7

Lens Adapter Skew

In testing Leica M and Voigtlander M and Zeiss ZM lenses on the Sony NEX-7, one must use a lens adapter. I used a Novoflex adapter and obtained some very nice results, but also some disturbing results as follows.

I took the snapshot below with the NEX-7, Novoflex lens adapter and Leica 28mm f/2 Summicron-M ASPH (it appears that the photographer is using a Sony NEX also!).

(!)

I focused on the woman at left; her face is reasonably sharp and the background behind her is blurred. Yet the face of the woman at right is blurred, and the background in the far distance is sharp. This is a skew of the plane of focus (a “swing”), presumably from a bad lens adapter, though it could be the camera itself, or (unlikely) the lens.

Click for a large crop, or see crops below.

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Diglloyd Guide to Mirrorless offers comprehensive integrated coverage of most APS-C and full frame mirrorless cameras and lenses.

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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Sony NEX-7 with Zeiss ZM 28mm f/2.8 C-Biogon

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