It is very unlikely that colour effect on the birds is anything to do with moire but their natural iridescence. The colours in the feathers of a bird are formed in two different ways, from either pigments or from light refraction caused by the structure of the feather or sometimes a combination of both. Iridescent colouration is commonly caused by a prismatic feather structure that scatters and refracts light to give the feathers their changing colours (same effect as a rainbow.) Odd that people are keen to blame something that occurs naturally in nature on the lack of a camera AA filter.

John K

If that were to happen on all frames taken it could be a slight sensor stain but if just this image it's barely noticeable even now to me. I guess a thumb print on the lens could affect the image colour slightly, especially in a contre-jour image. Or it could be a reflection within the lens of the light from the window. I feel its not really worth worrying about unless all images are affected. Just check the lens is clean (with a lens tissue or cleaning cloth, not a handkerchief) and double check some other recent images to see if you can see it on those too just to eliminate a sensor issue.

John K

Why are we discussing an Olympus camera Test Image?

John K

To me it looks fine, but if there is a slight colour cast, and I say again I cannot see it, it could be due to mixed lighting sources (not sauces as those writing above would have us believe!)
The only oddity with the picture I'd query is why you dialled in half a stop under exposure as when shooting with backlight you'd normally need to dial in more exposure to compensate. That has made the subject slightly dark and maybe what you're seeing.

John K (formerly of Hainault until the year 2000 - welcome to the forum by the way.)

I can't see any discolouration where you describe. How are you viewing it?
Possibility your monitor is set too bright or dark or contrasty (not sure what you're actually seeing!)

John K

Thank you too. I'm beginning to wonder if it isn't a camera fault, but will wait for the official Pentax remote to come before taking action. If that's the case it's a shame as the camera otherwise seems splendid.

John K

Thanks, fingers crossed while I wait for the post!

I wonder why the cheapie remotes fail to work the K-3 (and as I've now discovered the K-01 isn't too happy with them either) whereas the K-5 works every time with them.

I suppose it could be a fault with the K-3 but can't really believe that to be the case; I'll find out soon.

John K

The DPR images aren't very inspiring admittedly but surely that wasn't the point in taking them. What they are are typical examples of what Tom Dick and Harry would take so give a fair representation of what most users would end up with using that camera. Many here have higher expectations and would no doubt have achieved something far better, but in that quantity, maybe not.

John K

A set of Eneloops should get it back to normal.

John K

I have an MX date back too but the years available on it ran out in 1990 !

John K