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Old 21-02-2009, 11:08 AM
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rogerg (Roger)
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Join Date: Feb 2006
Location: Perth, Western Australia
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Quote:
Originally Posted by peter_4059 View Post
It's interesting that another one of his products (DSLR shutter) does support ICNR by having a delay before and after frame setting. I use this and set the delay after frame to be equal to the exposure time plus some time to download the image.
I was thinking about that. The longest exposure I've done with DSLR Shutter was 60 seconds, and that would have fitted within the timeout period Nebulosity 2 waits for the download, so would have worked with ICNR. Do you use it with exposure times longer than two minutes?

Quote:
Originally Posted by netwolf View Post
Roger, I had this discussion with Craig Stark the author some time back before v2 was released. Craig was basically of the view that ICNR was not the best approach....
Thanks... I wasn't aware of that yahoo group, that might be very useful! I'm still struggling with it saving files as FITS so I might ask some questions there about that. (Deep Sky Stacker seems to open the FITS OK but photoshop interprets them as greyscale, and I can't get Nebulosity to save the RGB FITS as separate files).

Anyway.. as for the ICNR issue... I have emailed Craig and just received his reply. Very much as you said, he believes it's best to not use ICNR. Oh well, while I disagree in some circumstances, I am happy to reside myself to being limited to not using INCR and instead a batch of dark frames. It just makes processing out the amp glow a lot harder.

Thanks,
Roger.
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