Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2021-09-24 08:23:45
UA_SEARCH_BOT_null @ 44.197.197.23

Zeiss ZF.2 135mm f/2 APO-Sonnar T*

MTF Chart

The 135/2 APO-Sonnar Distagon is an outstanding performer wide open at f/2, with very high contrast for coarse and fine structures throughout the frame. The MTF charts strongly suggest a complete absence of focus shift.

Field curvature

The “wave” in the chart for the 135mm f/2 APO-Sonnar is mild, but can be seen in real images on high resolution digital cameras on suitable subjects such as the Nikon D800/D800E.

Stopping down to f/5.6 largely equalizes the MTF curve for the finest details. Whether the “wave” is due to field curvature requires field tests to determine.

MTF analysis

Article continues for subscribers...

Diglloyd Guide to Zeiss is by yearly subscription. Subscribe now for about 21 cents a day ($75/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for only 68 cents a day ($249.95)!

Diglloyd Guide to Zeiss offers comprehensive integrated coverage of Zeiss DSLR lenses for Canon and Nikon. Nearly a decade in the making, it covers everything you need to know for every lens in the ZF.2, ZE, Milvus and Otus lines. Zeiss mirrorless lenses are covered in Guide to Mirrorless and Zeiss ZM rangefinder lenses in Guide to Leica.

  • Make better images by learning how to get the best results right away. A “cheat sheet” saving months of ad-hoc learning—Guide to Zeiss is much more than lens reviews.
  • Save money by choosing the right lens for your needs the first time. A year’s subscription covering ALL these lenses is a tiny fraction of the cost of just ONE lens.
  • Make better images, a sort of “cheat sheet” saving yourself months or years of ad-hoc learning—Guide to Zeiss spells out best practices.
  • Real world examples with insights found nowhere else. Make sharper images just by understanding lens behavior you won’t read about elsewhere.
  • Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops.
  • 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. And see Lloyd’s articles for Lenspire.Zeiss.com.

Aperture series 2, 2.8, 4, 5.6, 8, 11, 16 available in full article
MTF for Zeiss 135mm f/2 APO Sonnar T*
Aperture series 2, 2.8, 4, 5.6, 8, 11, 16, 22 available in full article
MTF for Zeiss 135mm f/2 APO Sonnar T*, measured from production lens

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2021 diglloyd Inc, all rights reserved.