Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2024-03-28 16:01:53
UA_SEARCH_BOT_null @ 3.238.195.81

For full access, subscribe here. Or click title to login.

Zeiss ZM 21mm f/4.5 C-Biogon

Vignetting: Zeiss ZM 21mm f/4.5 C-Biogon

Vignetting is fairly high at f4.5, improving only a little by f/8. This is simply the natural vignetting of this design, and is unavoidable.

The real issue is ray angle, which makes the 21/4.5 problematic on a color sensor like the M9/M9P. See the examples, which show the strong color cast to the corners (color shading). However, the color shift would not be an issue on the Leica M Monochrom.

Article continues for subscribers...

Diglloyd Guide to Leica is by yearly subscription. Subscribe now for about 25 cents a day ($90/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for about 75 cents a day!

Diglloyd Guide to LEICA contains in-depth coverage of Leica M system cameras and lenses, with additional coverage of Leica M Monochrom, Leica Q.

Special emphasis is placed on Leica M lenses and certain Zeiss ZM lenses.

  • Make better images by learning how to get the best results right away.
  • Save money by choosing the right lens for your needs the first time, particularly the Summilux/Summicron/Elmarit choice and/or Zeiss ZM.
  • Make better images, a sort of “cheat sheet” saving yourself months or years of ad-hoc learning. 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 [past 2 years or so].
  • 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 Leica.

Zeiss ZM 21mm f/4.5 C-Biogon relative illuminance

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