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NGC/IC Project / Re: Corrected NGC v0 online
« Last post by sgottlieb on April 26, 2017, 10:13:02 PM »
I don't believe the NGC/IC Project site ever had labeled images of the IC objects -- or at best a very limited subset.  That said the basic data is available, along with Harold Corwin's identification notes and my visual notes on over 1000 IC objects.

I'll confer with Corwin as well as Akarsh on the easiest way to grab that data.
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TAC Imaging / Re: Lunar imaging question
« Last post by John Pierce on April 26, 2017, 03:18:47 PM »
I'd just adjust one factor, the gain, at least until you run into some sort of limitation....   lowering gain shouldn't increase noise, which is your biggest enemy.
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TAC Imaging / Re: Lunar imaging question
« Last post by Davids on April 26, 2017, 03:14:37 PM »
Oops, got to stop using alternative math.  I wasn't far off your exposure time then.  I guess I'll just have to play with gain versus exposure some more.  I could try a neutral density filter also, I have one that I use for visual observing, maybe that will help.

Dave
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TAC Imaging / Re: Lunar imaging question
« Last post by John Pierce on April 26, 2017, 03:08:49 PM »
1/200th is 5 milliseconds (1/200 = 0.005)

of course, I have no idea how to correlate your "gain" setting to ISO.
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TAC Imaging / Re: Lunar imaging question
« Last post by Davids on April 26, 2017, 03:03:24 PM »
I'm using Firecapture for camera control and it only gives me a gain control number from 1 to 100 and exposure times in milliseconds.  Based on your recommendation of 1/200th, that works out to an exposure of 300 milliseconds.

The shot I posted was done with a gain of 38 (38%) and exposure time of 4.125 milli seconds.  So it looks like to duplicate what you are talking about, I should drop the gain to about 4 and increase the exposure time to about 300 mSec.

I'll give that a try.  I'm glad I didn't wait to get this camera...the learning curve has been a bit steep for me.

Cheers,

Dave
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TAC Imaging / Re: Lunar imaging question
« Last post by John Pierce on April 26, 2017, 02:40:12 PM »
using a regular (DSLR) camera, I've based my lunar exposures on daylight. good old 'sunny 16' rule,   shutter speed == ISO at f/16.    f/10 (your C8) is about 1 stop faster than f/11, so if you're using ISO 100 equivalent, then try 1/200th.
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TAC Imaging / Lunar imaging question
« Last post by Davids on April 26, 2017, 02:22:39 PM »
Hi All,

I picked up an ASI130MM camera recently to use for the eclipse in August.  I figured I might as well practice on the moon also.  My question regards exposure time vs. gain and how to avoid washing out the brightest features.  I got this shot that turned out ok, but Copernicus and Aristarchus are over exposed and the other images I have during the same session that aren't just don't have the same detail (I know it could be seeing). 

I'm using a C8 (note to self, get a Crayford focuser), AutoStakkert for Stacking, and Registax 6 for wavelet processing.

Any suggestions are very welcome.

Cheers,

Dave
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NGC/IC Project / Corrected NGC v0 online
« Last post by John Pierce on April 26, 2017, 12:56:03 PM »
I've crudely organized the raw NGC html files I got from Akarsh in folders per 100, and put them up here, http://www.ngcicproject.org/NGC/  so at least there's SOMETHING here.

So who has the IC data?
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NGC/IC Project / Re: NGC/IC Project
« Last post by Mark on April 25, 2017, 05:13:59 PM »

If we can get the help here, it would be much preferred for sure....
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NGC/IC Project / Re: NGC/IC Project
« Last post by John Pierce on April 25, 2017, 04:24:19 PM »
I'd prefer the people with server access all be locals known to us long timers, vs who knows who from cloudy nights.
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