Quote:
Originally Posted by Mighty_oz
Looking pretty good to me for 8 secs subs  Lots of detail there. |
Cheers :-)
Quote:
Originally Posted by Atmos
For a moment there I was expecting to see a 2s LRGB image (8s total)  There is quite a nice amount of detail in there, although a bit noisy towards the background which is to be expected with 8s images
Surprisingly, the core hasn't been blown out  
For only about 3 minutes of GB data they don't seem to have been impacted much on the image overall There is a part of me that wouldn't mind getting one of these cameras for LRGB imaging as it gives a wider field than my 694 and has significantly lower blue response |
Cheers Colin. haha, no, the core certainly didn't blow out on this one
I think the majority of the noise comes from (a) me being lazy and using unsharp mask on it because I gave up trying to get decon to play nice and (b) the noisy B & G data.
I've attached a small, 100% crop of one of the darker areas show in the image, in luminance, without any sharpening... it's a fair bit less noisy than the LRGB image.
Quote:
Originally Posted by glend
Lee, Obviously taken with the ASI1600. If your mount is reasonably aligned, unguided 20" subs would be easier - less subs required. Yes that many of thise subs is going to mean alot of storage and memory used. What camera settings did you use?
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Cheers Glen. The mount is reasonably well aligned, but the Linear Fast Reverse sometimes has significant RA drift that you can only battle with fast (every second) guiding. It doesn't happen all the time, and is basically a product of the PE from multiple belts coinciding, according to Avalon. When it's having one of those days, I doubt I could get anything of use with 20" unguided subs at this kind of resolution. I'm also particularly anal about the quality of subs I use.
I expect I'll be back to guiding the week after next (or whenever the skies clear after that) so it's not something I plan on trying to optimise.
As for camera settings, I used unity gain, with whatever ASI default the offset to for unity. I was using the 1.0.2.8 ASCOM driver, USB 3, speed set to 45. It dropped one sub all night.