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This page examines the optical performance of the Zeiss ZM 35mm f/2 Biogon on the Sony NEX-7.
The 35/2 Biogon is a very sharp lens, but one cannot assume that it will perform to its optical best because of ray angle interaction with sensor cover glass.
Test scene, Jan 7, 2012
A beautiful January day in the San Francisco Bay Area. I rode my Moots MootoX YBB 29er mountain bike up here with the camera and 5 lenses in a small hip-pack— something not possible with a large DSLR. The whole kit with the hip pack weighed just under 5 pounds, a compelling argument for the Sony NEX-7 form factor.
Shots were taken handheld at high shutter speeds (a bike ride is required to get here, and I had no tripod, besides it was very windy and a tripod can vibrate). To align them, a very slight cropping was done. Focusing was done just once (of course), at f/2.8.
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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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- Aperture series from wide open through stopped down, showing the full range of lens performance and bokeh.
- Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.
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