Green and blue spots on the photo

makmax

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Hi,
I have Olympus E-400 DSLR, I wonder why I get Green and blue spots on the photo whenever I shoot with Bulb mode for more than 15sec clearly seen on the dark part of the photo.
 
just guessing its noise or lens flare, you'll have to post it..
 
dead pixels. This happens on all cameras it's just a matter of time. With my D200 it happens when my exposures go over about 2-5min at ISO100 or about 1.5seconds at ISO800. Lots of cameras have inbuilt long exposure noise removal which work because it's usually always the same pixels which die at a given shutterspeed / iso.
 

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