EXCERPT page containing first few paragraphs. 2020-09-19 11:15:48
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The Sigma 35mm f/1.4 DG A1 HSM is compared here against the Nikon AF-S 35mm f/1.4G for autofocus accuracy and precision at f/1.4.
The Michael Tapes Lens Align target was used along with the Fine Focus Adjust feature of the Nikon D800E. Canon DSLRs have a similar feature.
Shot with the 36-megapixel Nikon D800E at ISO 100, in DX crop mode (solely to keep the file size down). Shooting distance was 885 mm from film plane to the target which is 25X the focal length.
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Diglloyd DAP is DSLR-oriented, but also contains workflow and other topics. Much of the focus is on Canon and Nikon but also Pentax and Pentax medium format.
Special emphasis is placed on lens evaluation, focusing on Canon and Nikon and Sigma lenses, but with a few others like Rokinon/Samyang.
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