Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2021-01-26 19:37:14
UA_SEARCH_BOT_null @ 3.238.70.175

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

Practical Tips

More depth of field is not always better, sometimes less is better. An f/1.4 lens offers extra versatility, because it has less depth of field at f/1.4, and better performance at f/2 than an f/2 lens (usually). But beware of focus shift, which argues for the f/2 lens! See the tip on focus shift in Best Practices — Focusing Tips — Autofocus.

Focus carefully, always

For large prints, accurate focus is essential. Stopping down helps, but overcomes only a modest amount of error; f/2.8 vs f/11 is only a factor of four (4) in resolved (linear) detail, hardly enough to compensate for a focus error of even a few feet at 10 feet with a 21mm lens. Try it yourself on an outdoor subject and critically assess your images; it’s demanding work to “nail” it. This problem will only worsen with future DSLRs in the 30-40 megapixel range.

Article continues for subscribers...

Diglloyd Making Sharp Images is by yearly subscription. Subscribe now for about 13 cents a day ($50/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for only 68 cents a day ($249.95)!

Diglloyd Making Sharp Images articulates years of best practices and how-to, painstakingly learned over a decade of camera and lens evaluation.

Save yourself those years of trial and error by jump-starting your photographic technical execution when making the image. The best lens or camera is handicapped if the photographer fails to master perfect shot discipline. High-resolution digital cameras are unforgiving of errors, at least if one wants the best possible results.

  • Eases into photographic challenges with an introductory section.
  • Covers aspects of digital sensor technology that relate to getting the best image quality.
  • Technique section discusses every aspect of making a sharp image handheld or on a tripod.
  • Depth of field and how to bypass depth of field limitations via focus stacking.
  • Optical aberrations: what they are, what they look like, and what to do about them.
  • MTF, field curvature, focus shift: insight into the limitations of lab tests and why imaging performance is far more complex than it appears.
  • Optical aberrations: what they are, what they look like, and what to do about them.
  • How to test a lens for a “bad sample”.

Intrigued? See Focusing Zeiss DSLR Lenses For Peak Performance, PART ONE: The Challenges, or (one topic of many) field curvature.

Use the f/4 markings when shooting at f/8 to ensure reasonable sharpness.
Focus is also slightly biased to infinity in this example (Zeiss ZF 21/2.8 Distagon)

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.