Recent Posts

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91
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.
92
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
93
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.
94
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
95
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?
96
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....
97
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.
98
NGC/IC Project / Re: NGC/IC Project
« Last post by Mark on April 25, 2017, 03:13:16 PM »
I suggest we cast a wider net for talent than exist here.  How about finding the thread on Cloudy Nights where NGC/IC has been being discussed, and ask there saying we have a home and a start on it already?

Mark
99
NGC/IC Project / Re: NGC/IC Project
« Last post by John Pierce on April 25, 2017, 01:04:02 PM »
so who's good with web scripting?      we need someone to take point on building a simple framework for the ngcicproject website.

the server is centos 6, can run php, perl, python, and I can probably setup most anything else, but I'd prefer any development is in something relatively mainstream and not new wave stuff like node.js or ruby, so I don't need to learn a new language to fix it.    I personally would prefer using a postgresql database, but I can manage mysql too.   I should be able to take the raw notes and munge them into database format, if you want to go that way, or just run with static .html files for each object, whatever.

you can probably pull a lot of the static text off here, https://web.archive.org/web/20170102050935/http://www.ngcicproject.org

I already have .htm files with images for the entire NGC catalog courtesy of Akarsh, and hope to cobble up a lookup page for that in the next day or so.


100
NGC/IC Project / Re: NGC/IC Project
« Last post by hgcjr on April 25, 2017, 12:30:53 PM »
All the help we can find to get the NGC/IC Project site back on line is much appreciated!  I'm staying out of the web work altogether (take a look at my own web site to see the pitiful extent of my baby-HTML "knowledge":  HaroldCorwin.net) and will concentrate on getting the data files back in shape.  I'm always available via email, and I'll check in here frequently, too.  Thanks again to all who want to help!
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