Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2024-03-29 01:59:55
UA_SEARCH_BOT_null @ 34.205.142.9

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

ZF.2 Otus 85mm f/1.4 APO-Planar

MTF for Otus 85/1.4 APO-Planar

These are measured results of the Otus 85mm f/1.4 APO-Planar. Contrast (MTF) varies with focusing distance with most lenses, and the 85/1.4 Planar is no exception; both infinity and close focus are shown.

Note that measured results at 10/20/40 line pairs/mm should NOT be compared to fantasy diffraction-ignoring computed results at 30 line pairs/mm (as is common practice in much of the industry).

See Field Curvature Analysis (Nikon D810, Mosaic) for a real world example of field curvature at work—how it plays out.

MTF at infinity focus

Micro contrast at frame center when wide open at f/1.4 measures as high as many lenses ever reach. A gentle rolloff is seen to frame edges, which is due to mild field curvature: actual performance is assuredly better than the chart indicates, but slightly out-of-plane. This is a very low level of field curvature for an f/1.4 lens.

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 about 75 cents a day!

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. 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 1.4, 2, 2.8, 4, 5.6, 8, 11, 16 available in full article
MTF for Zeiss ZF.2 / ZE at infinity with white light, 10/20/40 lp/mm
Aperture series 1.4, 4 available in full article

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.