Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2020-09-19 12:46:40
UA_SEARCH_BOT_null @ 3.92.74.105

Sigma 20mm f/1.4 DG HSM A

Enable javascript for this site to show Retina images, aperture series, image toggles, topics page menus and more.

MTF for Sigma 20mm f/1.4 DG HSM Art

MTF wide open at f/1.4 is astounding. Moreover the behavior is eminently predictable and thus superior for making real images: very high central contrast, rolling of gently to the periphery.

This is world-class performance. The fact that MTF drops off to the edges is expected, and even so, the performance at the edges at f/1.4 is as good as many f/1.4 lenses in the center.

See discussion of MTF vs the Leica 24/1.4 Summilux that follows.

Article continues for subscribers...

Diglloyd Advanced DSLR is by yearly subscription. Subscribe now for about 16 cents a day ($60/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for only 68 cents a day ($249.95)!

Diglloyd DAP is DSLR-oriented, but also contains workflow and other topics. Much of the focus is on Canon and Nikon but also Pentax and Pentax medium format.

Special emphasis is placed on lens evaluation, focusing on Canon and Nikon and Sigma lenses, but with a few others like Rokinon/Samyang.

  • 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 some of the new Sigma Art lenses vs Nikon and Canon.
  • Workflow discusses image organization, raw conversion and post processing. Many examples show processing parameters for direct insight into how the image was converted.
  • 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 Nikon or on Canon or on Pentax.

MTF for Sigma 20/1.4 DG HSM Art and Leica 21/1.4 Summilux-M ASPH

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2020 diglloyd Inc, all rights reserved.