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Weird issue

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  • #1784
    Noticeably-FAT
    Participant

    I was taking some long exposure shots last night, and I’m getting some weird light spots in the corners of the images, the longer the exposure, the brighter they are. Here is an example of what I’m talking about: http://www.noticeablyfat.com/gallery2/d/11788-2/CCSP+Night+Shoot+011.JPG
    I thought it might be stray light from the viewfinder, so I got out the handy little cover that came with the camera (and that I had forgotten about until then), but that didn’t seem to help. That pic is one that had the cover on. Any idea WTF that is, and how I fix it?

    #27080
    sleeping
    Participant

    Can’t see the image (access denied) but it may be a sensor heat issue – with long exposures the electronics in the camera can heat up and cause “light” to show up at the edges of the frame: http://dpanswers.com/content/tech_defects.php#ampn

    If your camera has long exposure noise reduction, turning it on may help some. It will also double your exposure time though.

    #27081
    Noticeably-FAT
    Participant

    Can’t see the image (access denied) but it may be a sensor heat issue – with long exposures the electronics in the camera can heat up and cause “light” to show up at the edges of the frame: http://dpanswers.com/content/tech_defects.php#ampn

    If your camera has long exposure noise reduction, turning it on may help some. It will also double your exposure time though.

    Thanks, the problem looks almost exactly like the amp noise example in your link. I’ll have to check for a noise reduction setting. I’m not worried about increasing the exposure time, that’s what I’m going for anyway.

    I wouldn’t have though heat would have had that much of an effect, it was hovering around 25? out on the lake.

    #27082
    soosh
    Participant

    Yeah, that looks like sensor heat.

    If you don’t have noise reduction in your camera, I think that there are software programs out there that can use a blank shot of equal length to subtract the noise that shows on the regular image.

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