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Old 16-07-2014, 08:12 PM
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Camelopardalis (Dunk)
Drifting from the pole

Camelopardalis is offline
 
Join Date: Feb 2013
Location: Brisbane
Posts: 5,018
Which exposure next?

Just as a little tangential discussion from the threads we've had about polar alignment and exposure length... I pose the question... which settings should I try next?

So far I've been taking shots mostly at ISO1600, and as it turns out it looks pretty noisy on my camera. 10 minute shots look like a snow storm

I've just ran a sequence of shots of 1, 2, 3, 4, 5, 6, 8 and 10 minutes at both ISO800 and ISO1600 and the ISO800 shots seem a lot less noisy. I've attached a few of these (an 800x600 area from the top left corner from each shot).

Assuming I can muster a half decent polar alignment next time out what settings should I try to capture the faint photons, and keep the noise under control? Even at ISO800, the 10 minute exposure is quite noisy... (but the 1100D was a bargain!)

How to make the most of what I've got...?

Drop the ISO further? Rely on stacking to smooth it out?

And what sort of exposure length should I be aiming for? (I'm not guiding, yet..)
Attached Thumbnails
Click for full-size image (ISO1600 180s.jpg)
104.6 KB28 views
Click for full-size image (ISO800 180s.jpg)
64.5 KB24 views
Click for full-size image (ISO1600 360s.jpg)
151.6 KB21 views
Click for full-size image (ISO800 360s.jpg)
90.7 KB19 views
Click for full-size image (ISO1600 600s.jpg)
182.1 KB24 views
Click for full-size image (ISO800 600s.jpg)
116.4 KB26 views
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