Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2023-03-29 06:42:15

Zeiss Touit 32mm f/1.8 Planar

MTF (also vs Zeiss and Leica)

Frame edge on an APS-C sensor is just shy of 12mm offset, so that the 12-15mm distance represents the area beyond frame edge and to the corners.

Wide open, the Zeiss Touit 32mm f/1.8 Planar offers good consistency across the frame with moderate contrast: slightly soft.

Stopped down to f/4, central sharpness is as high as any lens could be.

The wave-like graph shows a graceful drop-off to mid ones following by a move back up: this is likely a field curvature effect quite common with normal lenses. It is probable that actual contrast over most of the imaging area is actually much higher than the MTF chart suggests, but not in a geometric plane, a theory supported by field shots.

Stopping down to f/5.6 is strongly advised for geometrically planar subjects such as a distant landscape or building in order to raise the mid-zone sharpness to higher levels. But in general the 32mm f/1.8 Planar is not likely to prove a strong choice for such planar targets, at least not in the f/1.8 - f/4 range.

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.

Aperture series 1.8, 4 available in full article
Zeiss Touit 32mm f/1.8 Planar MTF

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.