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Examples of Focus Shift with 50mm Lenses 📹
In the examples below, focus wide open was aimed for the “10” mark. Note that all results are at a “head and shoulders portrait” distance, about 42 inches for a 50mm lens.
Video
Watch focus shift with the Nikon 50mm f/1.2. View full size.
Example — Canon EF 50mm f/1.2L Permalink
Focus shift is strong, moving accurate focus back about 1.5 inches (marked) at f/2.8. Even f/5.6 cannot compensate for the shift.
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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.
