Hi all. Playing around last week during the rainy weather. I bought a 12v Tec cooler a while back. I of course tore the tec unit out and was trying to fig out how to use it on my T3i. The heat sink portion fits well where the screen fold out. Not to be a permanent install but I used a bunji to secure to camera and allowed to cool for a half a hour. At this point, I do not have any temp regulator on it. I did take 10 dark frames before I turned the cooler on and 10 after the half hour. It definitely had less noise than the non cooled one but had a white like flair in the upper left in each of the cooled frames. You don't see it until you stretch it up a bit.
Any ideas what and why?