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EXCERPT page containing first few paragraphs. 2019-01-22 10:00:03

Pentax K-1

Super Resolution Mode File Format

The Pentax K1 (and K3 II) record all four shift-variant exposures into a single DNG files. Each exposure is 14 bits so each pixel has 56 bits of data: 14 bits for red, 14 bits (twice) for green, 14 bits for blue.

The images should be incredibly detailed, quite likely beyond even what a Canon 5DS R can deliver.

With 56-bit pixels (14 bit X 4), 14-bit raw files of data size of ~255MB megabytes should result, a bit larger with an embedded JPEG preview and metadata, perhaps 260MB.

Compression is used and appears to be lossless (waiting for confirmation). According to Alex Tutubalin of RawDigger:

According to DNG specs, lossy format is allowed only for 'linear /demosaiced/ 8-bit data' (so called Lightroom 'fast load proxy DNG' for faster editing in low res, than apply edits to full-res file).

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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 28 megapixels filling up to 5K display, plus large crops [past 2 years or so].
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  • 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.

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RawDigger info for 129MB Super Resolution image from Pentax K3 II
RawDigger histogram for 0..1024 for 129MB Super Resolution image from Pentax K3 II

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