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Zeiss Batis 40mm f/2 CF Aperture Series: Mountainside near Aspendell

Get Zeiss Batis at B&H Photo and see my Sony mirrorless wishlist.

This series assesses corner-to-corner sharpness, field curvature and any possible focus shift, particularly in corner areas, on the 42-megapixel Sony A7R III. On a scene like this, field curvature is a primary concern because even a small amount of it will drastically reduce sharpness where the field curves out of focus, typically in the mid zones or corners.

As a close focus (“CF”) lens which Zeiss states to be excellent from 1:5 all the way to infinity (“floating lens design for consistently high image quality across the entire focus range”), the far-distance performance is a good place to start to evaluate field curvature and total performance. The MTF charts for the Zeiss Batis 40mm f/2 CF show a very consistent performance across the field, which is consistent with the stated goal.

Zeiss Batis 40mm f/2 CF Aperture Series: Mountainside near Aspendell

Includes images up to full camera resolution from f/2 through f/8.

Mountainside near Aspendell
f2.8 @ 1/640 sec IS=off, ISO 100; 2018-10-18 15:28:30
Sony A7R III + Zeiss Batis 40mm f/2 CF + polarizer Zeiss
ENV: Road to Lake Sabrina, altitude 9000 ft / 2743 m, 50°F / 10°C
RAW: LACA corrected

[low-res image for bot]
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