EXCERPT page containing first few paragraphs. 2022-05-22 03:49:31
UA_SEARCH_BOT_null @ 3.235.24.113
MTF for Sony FE 40mm f/2.5 G
Sony supplies fantasy MTF, meaning MTF that is computed from a computer model (not measured with a real lens), does not specify the spectral balance (green light, white light?), and worst of all, ignores diffraction, which is the dominant factor at f/8, causing a substantial loss of both overall contrast and micro contrast aka brilliance. Also, the charts only use 10 and 30 line pairs per millimeter (l[/mm), and 30 lp/mm is well below 40 lp/mm, a far better metric for high-res digital.
Still, we can learn a few things about the Sony FE 40mm f/2.5 G performance, assuming a sample held to strict quality control standards can be obtained (an uneasy assumption, based on experience over years).
Article continues for subscribers...
Diglloyd Guide to Mirrorless is by yearly subscription. Subscribe now for about 25 cents a day ($90/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for only 68 cents a day ($249.95)!
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.
