diglloyd
diglloyd publication
Imagery: Auto - Large Table of Contents

How to Assess Noise

This section covers how we can assess noise in ways that are relevant to real photography.

Noise per pixel

When making a print, a 12.1MP D3 image needs about 1.42X more enlargement linearly than a 24.4MP D3x image. Image quality vis-a-vis noise is directly related to the enlargement size, and so comparing noise must be done at the same area.

The analogy here is scanning one square millimeter of 35mm film vs 1 square millimeters of 645 film, and then concluding that 645 film has identical resolution and grain. It does of course, but the frame as a whole needs less enlargement. Yet that is exactly what some DSLR noise comparisons with digital do: they compare the same number of pixels, representing different areas (magnifications).

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!

Canon 1Ds Mark III, ISO 3200, striation noise

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