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Zacuto Z-Finder

Live View Overview

Live View shows the actual image being recorded by the sensor, and thus allows extremely precise focusing.

Live View focusing is more accurate and consistent than any other approach, and should always be your first choice when feasible. This should be understood to mean that Live View allows 100% the same zone of focus each time: the zone of focus changes with very fine adjustments, even if the focus point stays undetectably the same, because there is often just enough depth of field to allow some “slop”.

Also, fast lenses have aberrations wide open that make focus ambiguous, so that when focusing with Live View, exact focus can be ambiguous. When stopping down after focusing wide-open, remember focus shift issues.

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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.

Live View at 5X and 10X magnification (Canon 5D Mark II)

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