Latest or all posts or last 15, 30, 90 or 180 days.
Welcome to diglloyd.com
In-depth review coverage is by subscription.
Also by Lloyd: MacPerformanceGuide.com and WindInMyFace.com
First-time visitor
Up to 1527MB/s sustained performance
🌈Shooting in Mountains thru ~Oct 27
I descend for internet service each day *when feasible*, but not always. Please be patient when subscribing. Hiking injured knee but cycling is therapeutic.

Pentax K1 Super Resolution Mode has Color Problems, Definitely an Adobe Camera Raw BUG — 2nd Example

See my Pentax K1 wish list at B&H Photo.

Pentax K1 pixel shift settings

I’ve sent an email to three Adobe engineers; I am hoping the email gets through and gets attention. I don’t have any direct phone contact with appropriate Adobe engineers, so I can’t get any immediate feedback before I leave on my 2 day trip today

UPDATE: 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.

As demonstrated, color in SuperRes mode is inferior in contrast and color to StdRes mode; a veiling blue haze intrudes. And it is not easy to fix—I did not find a satisfactory solution.

As I show via RawDigger histograms and the Photoshop RGB histograms in ProPhotoRGB, there is a very strong case that this is an Adobe Camera Raw 9.5.1 (595) BUG. Since I observed similar discrepancies in color with the Pentax K3 II (but did not investigate) this is probably a longstanding/forever issue with Pentax pixel shift raw files in ACR.

Pentax K1 SuperRes Pixel Shift Mode vs Std Res: Color Inaccuracy (Dolls)

Discussion and analysis includes the images, RawDigger histograms, RGB histograms.

StdRes mode — color is fine
f8 @ 1/6 sec, ISO 100; 2016-05-11 18:05:40
PENTAX K-1 + lensNA

[low-res image for bot]
Durable and fast, up to 1800MB/s
B&H Deal ZoneDeals by Brand/Category/Savings
Deals expire in 98 min unless noted. Certain deals may last longer.
$2699 SAVE $300 = 10.0% $38 FREE ITEMS Canon 11-24mm f/4 EF L USM in Lenses: DSLR
$774 SAVE $222 = 20.0% $100 GIFT CARD Pentax 10x43 Z-Series ZD ED Binocular in All Other Categories
$1497 SAVE $400 = 21.0% $82 FREE ITEMS Pentax K-1 DSLR in Cameras: DSLR

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.