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Sony 12-24mm f/2.8 GM

NEW! Available for pre-order.

3 XA Elements, 2 Super ED elements, nano AR II and fluorine coatings, four focusing motors, dust and moisture sealed.

MTF vs Field Curvature and Tips for Optimizing Focus

field curvature, MTF, Zeiss Distagon, focus accuracy

To Making Sharp Images I’ve added/revised two pages:

Both of these should be helpful for the photographer looking to extract maximum performance from high-resolution cameras, regardless of brand.

This example uses a Zeiss lens with modest field curvature: the 25mm f/2 Distagon.

More severe cases

As shown below, the deep dip/wave with the Leica 35/1.4 Summilux-M ASPH FLE is a prime example of a lens whose field curvature is strong enough to have a serious impact on across-the-frame sharpness of planar subjects such as a wall/building or a distant infinity scene: focusing slighty differently to take this into account can in some cases mitigate the loss of sharpness in the mid zones.

MTF for Leica 35mm f/1.4 Summilux-M ASPH
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Lloyd recommends 32GB RDIMM modules for most users (more expensive LRDIMMS are for 512GB or more).



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