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EXCERPT page containing first few paragraphs. 2019-10-22 15:56:20
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Nikon D850 monochrome

Examples: Frame Averaging for Ultra-Low Noise

This page looks at using multi-frame averaging for reducing noise arbitrarily low on the Nikon D850 monochrome. Frame-averaged images are compared to a single shot.

Images shot in 14-bit lossless compressed NEF, then converted to true monochrome DNG files using LibRaw Monochrome2DNG, which causes Adobe Camera Raw (or other raw converters) to see the files as true monochrome files and do no debayering as with a color camera. While the NEF files can be processed directly, the raw converter uses debayering in so doing, and so the results are much inferior and with artifacts, versus processing the file as a monochrome DNG.

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Diglloyd DAP is DSLR-oriented, but also contains workflow and other topics. Much of the focus is on Canon and Nikon but also Pentax and Pentax medium format.

Special emphasis is placed on lens evaluation, focusing on Canon and Nikon and Sigma lenses, but with a few others like Rokinon/Samyang.

  • Make better images by learning how to get the best results right away.
  • Save money by choosing the right lens for your needs the first time, particularly some of the new Sigma Art lenses vs Nikon and Canon.
  • Workflow discusses image organization, raw conversion and post processing. Many examples show processing parameters for direct insight into how the image was converted.
  • Jaw-dropping image quality found nowhere else utilizing Retina-grade images up to full camera resolution, plus large crops [past 2 years or so].
  • Real world examples with insights found nowhere else. Make sharper images just by understanding lens behavior you won’t read about elsewhere.
  • Aperture series from wide open through stopped down, showing the full range of lens performance and bokeh.
  • Optical quality analysis of field curvature, focus shift, sharpness, flare, distortion, and performance in the field.

Want a preview? Click on any page below to see an excerpt as well as extensive blog coverage, for example on Nikon or on Canon or on Pentax.

Variants SingleShot,merge4,merge9,merge16,merge32,merge49 available in full article
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f5.6 @ 1/1600 sec electronic shutter frame averaging 49, ISO 64; 2019-09-17 11:38:24
Nikon D850 monochrome + Zeiss Otus 55mm f/1.4 APO-Distagon
RAW: push 1.65 stops, +10 Dehaze, +100 Shadows

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