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Weird D2H long exposure problem


Richmond, US
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"RE: Weird D2H long exposure problem"

blw Moderator Awarded for his high level of expertise in various areas Nikonian since 18th Jun 2004
Sun 04-Nov-12 08:22 AM

> Anybody have any issues along these lines with their D2H or other D series Nikon Body?

It happens with just about all digital cameras, actually. What you're seeing is thermal buildup, and it happens more in the cold than in hot weather.

On a D2h, the typical fogging is a kind of pinkish thing, generally in the lower right corner of a landscape-format image.

> I am not 100% certain, but I believe it has happened both with and without the long exposure noise reduction turned on.

I'm pretty sure it doesn't happen with LENR, because that is exactly what the feature is designed to address. What it does is to capture your image as specified. But then it closes the shutter and takes another frame of equal duration. Since the shutter is closed, this frame should be completely black - every pixel should be 0,0,0. But it's not, because of the thermal problem. So then the camera subtracts the dark exposure from the original. (Actually it subtracts a derivative of it, since the thermal buildup pattern is known, and the end of the 2nd exposure is subject to much more thermal buildup than the beginning of the original one.)

Brian... a bicoastal Nikonian and Team Member

My gallery is online. Comments and critique welcomed any time!

A general, generic topic Weird D2H long exposure problem [View all] , aisnikkor , Sun 12-Sep-04 04:26 PM
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