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Bracket Your Focus
Focus bracketing can mean two distinct approaches:
- Refocusing for each frame (manual or auto focus), expecting a slightly different focus result each time.
- Focusing once, then making very small manual adjustments for subsequent exposures.
Focus bracketing can be useful not just for ensuring pinpoint focus, but also when you’re not sure just how the zone of sharp focus will fall across a scene; it might be that focus biased a bit forward or back ends up working the best. This is especially a consideration for lenses with field curvature or focus 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.
Leica S2 + Leica 180mm f/3.5 APO-Elmar-S