Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2021-12-02 21:00:14

Canon 100-400mm f/4.5-5.6L IS USM

An awkward lens with its push/pull zoom design. Can produce very good results if handled properly. Minimal hot spot issues provided that the lens hood is used and light is not allowed to fall on the front element. Sharp images require careful focus, but even so do not meet the critically-sharp threshold unless perfect technique is used (tripod, mirror lockup, etc). A usable, but not exciting lens for IR; it does everything reasonably well, but just doesn’t stand out in any area.

Canon 100-400mm f/4.5-5.6L IS hot spots

At the short end (100mm), hot spots are a potential problem, but should not interfere with many photos. At the long end, hot spot behavior improves. Avoid f/16 with all focal lengths.

Canon 100-400 f/4.5-5.6L IS Backfocus

At 100mm, very strong backfocus is mostly mitigated via filtration. LCD zoom is the best bet for eking out optimal sharpness.

Article continues for subscribers...

Diglloyd Infrared Photography is by yearly subscription. Subscribe now for about 8 cents a day ($30/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for only 68 cents a day ($249.95)!

Diglloyd Infrared Photography covers cameras and lenses for infrared photography.

The coverage explains all the issues involved in shooting in infrared, which do not change. It is not a review of any particular camera or lens, though many examples are included.

  • Guidance on workflow for infrared, including black and white and channel swapping for false-color images.
  • How infrared renders, and why certain spectral cutoffs matter: false color vs black and white.
  • Image quality issues to be on the lookout for in infrared.
  • Numerous lens evaluations in infrared.

View an overview of infrared as well as filter spectral transmission plus examples from an optimal 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.