Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2022-08-16 00:31:36

Pentax 645D

Diffraction Effects at f/11 to f/16

This page assesses what happens to image quality from f/8 to f/16, the contrast-robbing effects of diffraction being the concern.

For in-depth coverage of diffraction and depth of field and more, see Making Sharp Images.

Contrast and diffraction

When I tested the Leica S2, I discovered that the lenses were so outstanding that diffraction effects were already visible at f/8, with a clear loss of micro contrast at f/11, and a very dull f/16.

Similar contrast loss should be expected from the Pentax 645D, but the degradation from diffraction depends on how good the optics are to begin with, and might also depend to a small extent on sensor technology.

Article continues for subscribers...

Diglloyd Medium Format is by yearly subscription. Subscribe now for about 33 cents a day ($120/year).
BEST DEAL: get full access to ALL 8 PUBLICATIONS for only 68 cents a day ($249.95)!

Diglloyd Medium Format covers medium format camera systems, including the Hasselblad X1D and Fujifilm GFX.

These systems are hugely expensive, so make the right choice for your own needs (full frame vs medium format).

  • In-depth lens evaluations covering behaviors not likely to be found anywhere else, based on real-world field shooting.
  • How to configure menus and buttons and best operating practices, gotchas and how-to.
  • Real world examples with insights found nowhere else. Make sharper images just by understanding lens and camera behaviors.
  • Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to 100 megapixels filling up to 5K display, 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.
Pentax 645D + 55mm f/2.8 @ f/11, 2 sec, ISO 100

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.