diglloyd
diglloyd publication
Imagery: Auto - Large Table of Contents

Resolution from Diffraction —120/4

Here we examine the progression in image sharpness and contrast from f/4 through f/22 on the Hartblei 120/4. Lens design has subtle interactions with diffraction, and some lenses do hold up slightly better than others; the Hartblei 120/4 holds up exceptionally well when stopped down.

This subject, the power-coated metal surface of a storage rack, was chosen because of its “fractal” nature and its contrast. The 24.4MP Nikon D3x was used for this test.

Aperture series

The subtle graying of detail is visible even by f/8, as is expected with any top-quality lens (lesser lenses start out crappy and improve by stopping down to f/8 or f/11).

By f/11 the graying of black and white is obvious, along with the loss of contrast in fine detail, most easily seen by noting the loss of the fine bright speckles.

Article continues for subscribers...

If you’re already a subscriber, CLICK HERE TO LOG IN

diglloyd Advanced Photography

diglloyd Advanced Photography includes hundreds of pages of exclusive coverage and high resolution, Retina-grade example pictures detailing Canon and Nikon DSLR bodies and their lenses, with in-depth analysis of sharpness and contrast, color, bokeh, vignetting, distortion, MTF, and flare. Also included is a wealth of in-context technique and workflow insight. Since 2006, diglloyd Advanced Photography is the authoritative review and on-line reference for discerning Canon and Nikon shooters. Subscriptions cost $ per year.

  1. Explore the table of contents
  2. Check out Lloyd Chambers’ Blog
  3. Subscribe today!
metal
f/4

diglloyd Home Page | Terms of Use | PRIVACY POLICY | Contact
Copyright © 2008-2015 diglloyd Inc, all rights reserved.