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Example: Two-Frame Stack (Spuller Lake, Zeiss Loxia 35/2)

The composition benefits from having everything sharp near to far, but without focus stacking there would be no way to render the foreground gneiss erratic sharply, even at f/16, and that would degrade the entire image too much.

Zerene Stacker PMAX mode delivered a ready to use image with the Align & Stack All (DMAP) command. No obvious stacking artifacts are found, though there is a blurry area just behind and to the left of the foreground gneiss boulder: a 3rd frame would have been helpful.

The lingering slightly blur in the extreme bottom left is a lens weakness (the near-focus frame was on the white gneiss erratic near lower left).

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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.

Spuller Lake, Hall Natural Area in Hoover Wilderness
Focus-stacked image, 2 frames
f11 @ 1/40 sec, ISO 100; 2016-08-26 15:49:04
Sony A7R II + Zeiss Loxia 35mm f/2 Biogon

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