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EXCERPT page containing first few paragraphs. 2022-05-17 09:57:35

The test target

Check your Diopter Setting

On cameras with diopter adjustment, verify that the setting you’ve chosen doesn’t trick your eye into misfocusing (shoot a high-contrast target such as newspaper, or a resolution target). Since the viewfinder forms an image of the internal camera ground glass, it can’t cause misfocus by itself, but it can force the eye to compensate for mal-adjustment, which can lead to eye fatigue/eyestrain and hence errors.

Manual focus accuracy can be tricky under the best of condition. It gave me fits with the Nikon D3 (but not with the Canon EOS 1Ds Mark III). First, Nikon replaced the focusing assembly. But I still could not obtain accurate manual (eye) focus with lenses like the Zeiss ZF 100/2 Makro-Planar and several others.

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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.

The test target

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