[glend (Glen)]

So my wonderful Canon 450D modified and cooled has developed the blues, or the magentas. I have attached two test shots below that exhibit the problem (it is always in the same location on the frame). The strength of the colour is dependent on the length of the shot, so the one with more colour is a longer sub than the other one.

Had anything changed? Well yes, I took Merlin's advice and removed the front low pass 1 (aka the anti-alysing) yesterday, disassembly and re-assembly went fine as usual (its been taken apart numerous times in the past for cleaning, mods, etc and I know what I am doing). Following the removal of the Low Pass 1 I did these test shots (in my observatory) and got these results. At first I thought I had a light leak, but I even put the camera in a black bag and it still produced these results, so I am thinking its component related, but it seems to have a grain or pattern to it. Anyone seen anything like this before and if so what's the problem? I would hate to lose this great camera. I can put the Low Pass 1 back in but would like to know if it's related or not.

BTW the camera had a Baader UV/IR Cut filter on the front of the T-adaptor so this is not UV light pollution coming in from the front.