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Oversampling for High Image Quality (Sony NEX-7)

The Sony NEX-7 has a 24-megapixel APS-C sensor, with its 20-megapixel Sony RX100 sibling having an even higher pixel density.

Were these sensors scaled to full-frame at the same pixel density, we would have:

Image quality of future camera can take advantage of high pixel densities to achieve ultra high per-pixel image quality: the elimination of digital artifacts by downsampling a higher resolution sensor to a lower resolution output size. Or, the full resolution can be used natively.

The key points here are that:

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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.

Relative sensor sizes

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