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Blur Caused by Digital Capture
All forms of digital capture introduce sampling blur because the recording technology is discrete.
A digital sensor cannot detect any detail within a photosite. As shown below, detail within a photosite turns to some intensity of gray or color; all internal detail is lost, which also means that a line spanning two adjacent photosites cannot be resolved; at least 3-4 photosites in one direction are needed.
For more on this topic, see Sensor Technology — Blur Inherent to Digital Capture.
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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.
