Quote:
Originally Posted by 2stroke
I would say its just the heat, DSLR just suck in high temps without cooling hence why cds make astro cooled models. You could try a cooler box, really though dslr's weren't made for the job, in winter you have temp's on your side though. Test it by putting it in the refrigerator and see for your self  Best solution go with a tec ccd or a tec cooled dslr but i'am sure the dslr crowed will be up in arms over this comment haha.
Anyhow if the refrigerator test fails then send it back as it could be a bad ground somewhere or emf issue, though i have only had this happen once with a modded 1100d i did. |
I'm not 100% sure it is heat. I don't know, it just seems strange that they are in the same place for all ISO speeds up to 3200, getting worse with increased ISO and exposure time. Doesn't seem to make a difference if I take one long exposure alone, or twenty long exposures. From ISO 6400 up there are some white spots but the red, green, and blue pixels all but disappear.
It would be helpful if the Canon support request form on their website actually worked. I might call them on Monday if I don't get stuck at work, and I might call JB Hi-Fi in Newcastle and see if they can exchange the body. Then there's always the risk of getting a worse one.
