PC Pals Forum
General Discussion => Hobbies & Crafts => Topic started by: Rik on November 15, 2009, 17:49
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Has anyone ever come across a reference to this? It was always an issue in film photography with long exposures, but I've never seen it referred to in connection with digital photography.
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Well, it says here not to worry about it:
http://malektips.com/digital_photography_0039.html
Further:
http://photo.net/nikon-camera-forum/00IdiZ
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Useful, thanks. I like the idea of cancelling with a blank frame...
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It was the bane of astrophotographers who wished to take long exposures to capture ever dimmer objects. A way around it was to hypersensitize the film by bathing it in hydrogen gas for a few hours. Best results were obtained with Technical Pan.
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I actually have no idea whatsoever what this thread is about! :stars: :)x
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In a nutshell, long exposures cause fogging even in the dark. :)
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Ah, OK, and digital cameras don't do that. :)
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I'd describe it differently. Normally, photographic exposures are linear, eg you double the shutter speed, you open up the lens by a stop. This is only true, though, for a limited range of exposure times, too short (rare) or too long, and the film became less sensitive. Anything much above about 30 seconds required compensation, and there was no easy way to work out how much.
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But, digitals are immune, yes?
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Yes, they just get noisy instead, but you can cancel that in a number of ways.
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Somehow, I don't think it's something I'll need to be concerned about. :)
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Only if you get into night shooting.
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I need go get back into day shooting first. :)
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Most people shoot birds. :o:
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Only the ones that sh•t on the windscreen. But it's just as easy go not go out with them again. :)x
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:-X ;D