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EXCERPT page containing first few paragraphs. 2023-06-02 10:59:04

Scene shot at 1/4 second handheld (twice)

Blur by Camera Movement

Blur is more obvious on high-resolution cameras when viewed at actual pixels, because the amount of blur is relative to the photosite (pixel) size— a fixed amount of blur can be smeared over more or fewer photosites.

When the camera moves during exposure, the amount of perceived blur due to camera movement is a function of both how much camera movement occurs during the exposure and the photosite size. If the camera movement is small relative to the pixel size of the sensor, then that amount of camera movement will not be noticed.

Loss of sharpness from slow shutter speed

Just a little movement of the camera can cause major sharpness loss, often showing as a double image corresponding to mirror slap on a DSLR.

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  • 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.

Motion blur due mainly to mirror slap
Two frames handheld at 1/4 second with Canon 1Ds Mark III + Zeiss 35mm f/2 Distagon

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