Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2024-02-24 02:02:09

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Use a Different Focusing Screen

The right choice of focusing screen can be very helpful with manual focus, but unless you test yourself and find that accuracy and consistency are not working for you, it’s usually better to stick with the “stock” screen, because the stock screen works well for autofocus and a variety of lenses.

The fewer lenses you shoot, the easier it is to choose a focusing screen that is optimal for it. The best focusing screen for an f/1.4 lens might not be the best for an f/2.8 or f/4 lens. If you do choose an alternate focusing screen, choose it for the lens you shoot most often.


Some concern is warranted when switching screens— a tiny difference in thickness will of course throw off focus accuracy, so always verify focus accuracy after switching screens, no matter what the brand.

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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.

Canon Ec-S SuperMatte (left) and Ec-D grid screen

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