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EXCERPT page containing first few paragraphs. 2022-08-17 00:38:58

Example: Vista at 85mm (View North in Blue Dusk from Pothole Dome)

When the weather does not deliver a colorful sunset for more than a week, shoot what it actually looks like—many a day in high country has subtle color well worth recording. This image is particularly beautiful on the late 2015 iMac 5K. It has been left true-to-life, rather than try to whack-out the true look of dusk.

Here, the Zeiss Otus 85mm f/1.4 APO-Planar was used. A single shot almost gets the job done at f/9, but in fact there is a moderate forward field curvature in the outer zones that results in less than optimal sharpness at the edges at medium distance. Also, f/9 is not enough to deliver tack-sharp boulders in the foreground (when focused in the far distance), nor tack sharp trees in the bottom right were desirable also. Two shot stack.

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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.

View North from Pothole Dome, Blue Dusk
Focus-stacked image from 2 frames
f9 @ 1/25 sec, ISO 64; 2016-06-15 19:40:38
NIKON D810 + Zeiss Otus 85mm f/1.4 APO-Planar

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