DPReview.com is closing April 10th - Find out more

DP2m: first images, first problems

Started Oct 28, 2015 | Discussions thread
xpatUSA
xpatUSA Forum Pro • Posts: 23,017
Re: DP2m: first images, first problems

xpatUSA wrote:

This is an interim report, I'm off to compare JPEG performance to see what that throws up.

Well, next, I actually went back to RawDigger to look at the raw data; first, I had the RGB review image up, the one that shows the yukky green at the side. But, sliding the cursor around, I noticed that the "green" colored sky at left had less raw "green" in it than the "grey/white" sky just above the crane boom.

So I took a couple histograms from those areas:

These raw values, by their level values and ratios, are telling me that the areas should have similar colors after conversion with no color cast difference between the two areas. The only noticeable difference here is that levels are about 1 EV lower at left of the image which could be attributed to vignetting from the lens.

Certainly an image made from these raw values looks as much as can be expected:

So, for now, I am leaning toward the type of conversion from RAW to RGB as being the culprit.

Later . . . .

-- hide signature --

Ted

 xpatUSA's gear list:xpatUSA's gear list
Panasonic Lumix DMC-LX1 Sigma SD9 Panasonic Lumix DC-G9 Panasonic Leica DG Macro-Elmarit 45mm F2.8 ASPH OIS Sigma 17-50mm F2.8 EX DC OS HSM +11 more
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow