Imagery: Auto - Large Table of Contents

EXCERPT page containing first few paragraphs. 2018-11-13 17:30:02
UA_SEARCH_BOT_null @ 54.82.93.116

Pentax K-1 Pixel Shift setting

SuperRes Pixel Shift Mode vs Std Res: Color Inaccuracy, ACR Bug (Macbeth Color Checker)

See also the dolls example, which confirms the findings here.

UPDATE 13 May 2016: This is what I heard from Adobe: “Known issue. It is fixed in the next ACR update. High ISO dngs shots with super resolution”. That sounds good, but both my examples are at ISO 100, the lowest available ISO.

SuperRes pixel shift mode (“SR-PSM”) merges 4 exposures into one raw file. The raw converter must then take those 4 exposures and (somehow) create an RGB pixel for each pixel in the image.

It might be assumed that a StdRes image and SuperRes image would have the same color behavior, but this is demonstrably not so, at least for Pentax K1 SuperRes mode processed with Adobe Camera Raw 9.5.1 (595). Similar discrepencies were found with the Pentax K3 II, but not investigated. Possible causes include:

Article continues for subscribers...

Diglloyd Advanced DSLR is by yearly subscription. Subscribe now for about 16 cents a day ($60/year).
BEST DEAL: get full access to ALL 7 PUBLICATIONS for only 68 cents a day ($249.95)!

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].
  • 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 StdRes,SuperRes available in full article
f8 @ 1/250 sec, ISO 100; 2016-05-12 16:37:47
PENTAX K-1 + HD PENTAX-D FA 15-30mm F2.8 ED SDM WR @ 30mm

[low-res image for bot]

diglloyd Inc. | FTC Disclosure | PRIVACY POLICY | Trademarks | Terms of Use
Contact | About Lloyd Chambers | Consulting | Photo Tours
RSS Feeds | Twitter
Copyright © 2008-2017 diglloyd Inc, all rights reserved.