EXCERPT page containing first few paragraphs. 2023-03-29 06:20:54
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Examples (Alpine Creek, Canon 5DM3)
Shot with the Canon 5D Mark III at ISO 100, ETTR used when possible for better image quality.
My goal here was to assess the overall image quality of the Sigma 35/1.4 DG HSM for field use at a range of apertures. I was also interested in field handling, an area with pleasant results: the high micro contrast at f/1.4 made accurate focus relatively easy.
Lighting conditions were dim late-day overcast with a steady change in color temperature towards dusk, so a best effort has been made to set a proper white balance for each photo.
Out of band comment: It is my distinct impression that the Canon 5D Mark III sensor is a limiting factor in the image quality seen here. The lens seems eminently capable; the image quality has a certain harshness to it that I believe is the Canon sensor (I am very used to the premium quality of the Nikon D800 sensor). This is purely subjective and absolutely not a “proof”, but it is my distinct impression that the quality is not what it could be and that this is not a lens issue.
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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.
- Make better images by learning how to get the best results right away.
- Save money by choosing the right lens for your needs the first time, particularly some of the new Sigma Art lenses vs Nikon and Canon.
- Workflow discusses image organization, raw conversion and post processing. Many examples show processing parameters for direct insight into how the image was converted.
- Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops [past 2 years or so].
- Real world examples with insights found nowhere else. Make sharper images just by understanding lens behavior you won’t read about elsewhere.
- 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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