Hello to all members and Adobe Team.
i use lightroom 3.3 and i have made a comparison between my 2 cameras with the same sensor , e-p1 and e-pl1 and e-p1, and while they have identical grain like pattern and rendering at high iso (which is what i was expecting since they have the same sensor and only the Anti-Aliasing filter is lighter in e-pl1), colour rendering at high iso is very different (at low iso its different but i have profiles with colorchecker and the differences are minor).
So i will post raw files in tungsten lighting (the most demanding for high iso-.-- 1600 i mean and even at 800 i can clearly see the problems i am describing).
Olympus e-pL1 white balance is really, but really bad.. everything turns green (its really bothering to adjust and affects low iso images too... i spent so much time correcting the green cast but there is something that i can never get right).
There are green/yellow/orange and purple/blue blotches at high iso.... it happens in tungsten lighting and fluorescent (less so at fluorescent, but still), those green/yellow blotches appear in uniform color areas that are in shadows its like a tint and there is nothing of this sort in e-p1 at iso1600 and even much higher isos have this kind of noise well distributed by all colour channels (they are usually small blotches/spots a little to the irregular round shap but sometimes have big size and very irregular shape).
I believe its something in the blue channel but in the green channel also!
Reds and colours at high iso are much more saturated in e-pl1 than in e-p1 (and from imaging-resource samples and dpreview e-pl1 its one of the cameras which has more saturated colours at high iso which sometimes it looks they are clipping channels).
By the way this is not something just related to these testfiles it happens in almost all high iso files i believe different colour rendereing/demosaic would do much better.
Here are the raw files, the first one is Olympus e-pl1:
The second one is Olympus e-p1:
Notice in the blue trip Samsonite bag there are much more blue blotches with the chroma noise slider at 0 (even at 25 there is a difference in Dynamic range between e-p1 and e-pl1, when all review sites clearly say that e-pl1 is a little better at high iso even in raw, and its not just because it has more detail that you can use to kill a little grain and make things equal).
Please dont post or use this photos as examples as they are not flattering... they are just for Adobe engineers or private testing by users not for posting in other forums.
So Olympus cameras and Panasonic camera sensors all exibiht this problem but i have never seen something like this.... the cameras are quite good at iso1600 except all shadows have that tint even with chroma noise sliders at 40 they never disappear ... is it possible to solve the colour demosaicing and left intact the luminance one?
Please be kind to m43 cameras since they are selling very well and i think they dont have proper support... ( i bet if this was a problem with Canon or Nikon it would be corrected in a time... we dont have coustum profiles but there is a solution for that... although for this problem we dont have better solution since its too selective and only in shadows).
By the way in Rawtherapee i have made adjustments in channel mixer (the levels of green that the blue channel has are very high; so i took a little green (and just a tiny bit of red) and the shadow areas start getting rid of the green dots, so here it is a HINT) and there were many improvements almost making them disappear... however i want to use lightroom not rawtherapee with AMAZE demosaicing.
Oh by the way look at Rawtherapee way of removing colour moiré with AMAze algorithm its fantastic it gives you detail back and no colour moire which shows a lot with e-pl1 in lightroom (but i know its because of lighter AA filter and its not a priority).
Thanks for your help!