EXCERPT page containing first few paragraphs. 2019-12-15 16:15:16
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Shot on the 42-megapixel Sony A7R III.
This page compares the Sony FE 135mm f/1.8 GM to the Sigma FE 135mm f/1.8 DG HSM Art from f/1.8 through f/8 on a demanding planar (flat) target with extremely fine details. Focus shift and field curvature are assessed along with sharpness through the aperture series.
It is not a given that the Sigma FE 135mm f/1.8 DG HSM Art will perform the same on Sony as on Nikon or Canon. The Sigma FE 135/1.8A was designed for Canon and Nikon DSLRs, whereas the Sony FE 135mm f/1.8 GM is a clean-sheet design for Sony mirrorless. See the discussion in Ducks in Dana Meadow Pond at Dusk.
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Diglloyd Guide to Mirrorless is by yearly subscription. Subscribe now for about 25 cents a day ($90/year).
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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.
- Make better images by learning how to get the best results right away. For example, the best way to set up your Sony camera.
- Save money by choosing the right lens for your needs the first time, particularly with the numerous lenses available for Sony.
- Make better images, a sort of “cheat sheet” saving yourself months or years of ad-hoc learning—best practices and how-to and processing parameters are discussed and shown.
- Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops.
- 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.
Want a preview? Click on any page below to see an excerpt as well as extensive blog coverage, for example on Sony.