Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2022-08-13 19:52:42

Sony NEX-7

Lens Adapter Skew

In testing Leica M and Voigtlander M and Zeiss ZM lenses on the Sony NEX-7, one must use a lens adapter. I used a Novoflex adapter and obtained some very nice results, but also some disturbing results as follows.

I took the snapshot below with the NEX-7, Novoflex lens adapter and Leica 28mm f/2 Summicron-M ASPH (it appears that the photographer is using a Sony NEX also!).


I focused on the woman at left; her face is reasonably sharp and the background behind her is blurred. Yet the face of the woman at right is blurred, and the background in the far distance is sharp. This is a skew of the plane of focus (a “swing”), presumably from a bad lens adapter, though it could be the camera itself, or (unlikely) the lens.

Click for a large crop, or see crops below.

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.

Sony NEX-7 with Zeiss ZM 28mm f/2.8 C-Biogon

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2022 diglloyd Inc, all rights reserved.