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Having some trouble getting good data for this comet. I can only do 15-30” exposures at high gain/ISO. Anything longer than that produces the comet trail. I tried to collect about an hour of data but I barely see anything more than the hazy cloud around the comet after stacking. I also used the L-Pro filter. Could that be blocking important signal?
I've seen posts on here of this comet and the subs were more than a minute, some cases 180". I'd like to image it with my c8+asi2600mc just wanted to hear from others on their acquisition techniques. Track on the comet's nucleus and you'll have longer integrations, considering that it moves at 14"/min. I doubt that using a C8 and a 2600MC is a good idea, even at bin 2x. Never mind the high moon.
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No, comet is a broadband target so just use a luminance filter on OSC or RGB (with optional luminance) on mono. This comet is also not very dim by any means. I've been doing 30s without issue at f5 and getting plenty of data. Shoot exposures long enough to get plenty of information but not long enough to get trailing. I personally wouldn't guide on the comet. Guiding on stars lets you get a better/cleaner star separation in post-processing.
There are different approaches to this of course, so go with what works for you.
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I tried 30" ISO12800 and still could see movement in the comet in one frame. Ya, it's moving very fast... at your image scale comet guiding may indeed be the best course of action.
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Track on the comet with short or long exp length in PHD2? 2 seconds should be enough right? What about the use of the L-Pro filter? Should I use a filter or no? L-Pro if is really LP dependant in use and what kind of P you've got. You suppress the yellow-green bandpass so you should still get a decent shot at the comet.
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I probably would put it on.
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