EXCERPT page containing first few paragraphs. 2024-04-26 14:47:45
UA_SEARCH_BOT_compatible_botmozilla/5.0 applewebkit/537.36 (khtml, like gecko; compatible; claudebot/1.0; +claudebot@anthropic.com) @ 18.226.251.68
For full access, subscribe here. Or click title to login. 
Aperture Series: Windows (Olympus E-M5)
This aperture series was taken to evaluate sharpness for a planar subject to evaluate field curvature, and also to evaluate distortion and vignetting.
The lighting was the gray light of winter dusk (moderately blue), and the Olympus E-M5 generally does not provide pleasing results under such conditions. But the results are instructive, even if the subject is boring.
The windows being covered by screens, a prominent moiré pattern quickly develops, showing the suggesting the Olympus E-M5 has a weak anti-aliasing filter, though screens in general can cause moiré no matter what, so this is not a proof.
Windows
Focus was right in the middle using autofocus, which is quite accurate under such conditions (and manual focus is a challenge with the 17/1.8, due to a high level of aberrations wide open which cause a low contrast image to be hard to focus).
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 about 75 cents a day!
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.
