Sigma SD1M wrong colors

Started Mar 27, 2013 | Discussions thread
Gary Dean Mercer Clark
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Re: A few other things going on...
In reply to Roland Karlsson, Mar 30, 2013

Roland Karlsson wrote:

Gary Dean Mercer Clark wrote:

First let me say that I found your images on Flickr to be outstanding. Bravo. Beautiful.The Italian countryside and seascapes are luscious. The floral work is rich and colorful.

Now about the difference between the DP Merrill and SD1M.  After reviewing your work, it is clear that you like bright, very colorful images with punchy color.  Shoot with Auto white balance in vibrant mode with the SD1M to produce the most colorful images.  If you are shooting raw---just change the settings to Auto + vibrant and see if that doesn't produce pretty accurate reds with the SD1M.

I've never had good luck shooting with the different color temperatures like overcast etc.  Like you I have my monitor color calibrated--using a different system, but I could see the orangish cast you mention---deffinitely a result of using the overcast white balance setting.  When shooting outdoors, I've found that shooting on auto white balance is very accurate.

Its a little difficult to compare apples to oranges between your DP Merrill images and the SD1M images as the exposures are different.

One camera was more over exposed than the other.  I think if you do a head to head test with both cameras with the same settings, you will find very little difference in color accuracy.  Let us know how your test works out.

Gary Dean Mercer Clark

Correct me if I am wrong, which I can be as I have no Sigma camera, but as far as I know it does not matter what setting you have when you shoot. You can always chose any setting in SPP, except that you  cannot change the actual exposure. So, it is vibrant or overcast or whatever ... it does not matter. Its just a starting point for SPP.

Sure-- you are shooting raw so you can change the setting later.  I shoot on auto white balance and make a change afterwards if needed.

So, therefore some here asked for the RAW files, and got them.

And ... the RAW fils are different. The DP2M files have red reds, that maybe are somewhat pink. And the SD1M files have orange reds. Its very easy to see.

Now, the exposures are not made at identical lighting. So, to be absolutely sure, tests where both cameras have the same situation is probably a good idea.

I find that strange.

The color temperature of the scenes were completely different at 10am with than 4pm in the afternoon.  The cloud conditions and lighting are completely different. The exposures are completely different. I took the SD1M files and set the white balance to auto and the orangish red turns more red in the scene with the color temperature of the lighting that it was shot in.  10 O'Clock sunlight and angles versus 4Pm sunlight and angles--thats a big difference in scene color temperature.  I was glad to download the files and take a peek at them myself--it was interesting comparing two different camera's images of the similar scene, shot at different times of the day in different conditions and different exposure settings and I'm not sure that too many conclusions can be drawn from these two sets of photos.  It was nice to see actual raw files and to get the opportunity to see them, It was really nice of the OP to share the originals with the forum.  If you look at his flicker images--he really has some very nice photographs posted online.  The part of Italy where he lives is so beautiful. I spent about 20 minutes studying his work and enjoying it.  I want see this part of Italy!

/Roland
X3F tools:
http://www.proxel.se/x3f.html
https://github.com/rolkar/x3f

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Gary Dean Mercer Clark

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