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MTF for Zeiss Batis 18/2.8 Distagon
Zeiss MTF is measured with a real lens on the K8 MTF tester using appropriate thickness sensor cover glass for the target camera platform using white light. Thus: real lens with white light with diffraction accounted for and the actual camera platform. The only other vendor which (maybe) does this (and only for one aperture) is Sigma.
MTF charts show a remarkable performance in which the central 3/4 of the frame (15mm offset) is already optimal wide open at f/2.8—stopping down has no significant benefits. Central performance is razor sharp wide open, with peak performance corner to corner achieved by f/5.6. Overall contrast for coarse and medium structures is very high wide open even into the corners, which accounts for a strong visual impact when shot wide open, as seen in the various examples.
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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.
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