Image of the day

Captured by
Douglas Rollain

Lion Nebula SH2-132 - RC71

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Posts Made By: Greg Bradley

October 6, 2007 01:15 AM Forum: CCD Imaging and Processing/Deep Sky

Overdone, but it is my first attempt

Posted By Greg Bradley
I agree, that is a wonderful first shot.

You have the touch!

Greg.

October 6, 2007 01:16 AM Forum: CCD Imaging and Processing/Deep Sky

The Blue Snowball

Posted By Greg Bradley
Lovely.

Greg.

October 7, 2007 10:53 PM Forum: CCD Imaging and Processing/Deep Sky

IC 1805 Heart Nebula HA-HaR-G-B

Posted By Greg Bradley
Nice job.

Greg.

October 8, 2007 04:07 AM Forum: CCD Imaging and Processing/Deep Sky

1st Image with the G-11!

Posted By Greg Bradley
Congratulations. A whole new world of possibility has opened up before you.

Greg.

October 24, 2007 07:40 AM Forum: CCD Imaging and Processing/Deep Sky

Autoguiding question

Posted By Greg Bradley
Hi Floyd,

Interesting concept. It kind of matches my experience. I use an Sbig camera selfguided and a Tak NJP mount - no PEC but then the NJP has something like 3.5 arc sec PE which is amazingly good.

I use .1 min 1 sec max moves, .5X guiding speed, no backlash compensation, 1-2 second guide exposures if I can get a guide star bright enough, sometimes longer up to 5 seconds.

I just did a big write up of my know-how gained so far on this subject on another group. I can email it to you if you want.

The big 3 basics of autoguiding are:

1. Polar alignment
2. Balance
3. Focus

In that order of importance.

Other issues of which software settings to use are of less importance but good to know.

If the big 3 are done right autoguiding falls in your lap. If they are done poorly then
expect to spend a lot of time fiddling with everything to your general frustration!!

Cheers,

Greg.

November 2, 2007 05:25 AM Forum: CCD Imaging and Processing/Deep Sky

Comet attempt from Utah

Posted By Greg Bradley
Great shot Tyler. That's one of the best I have seen and there are a lot.

Greg.

November 10, 2007 11:17 PM Forum: CCD Imaging and Processing/Deep Sky

Another dark nebula - with a soft, chewy center!

Posted By Greg Bradley
Great shot Tom.

Its very interesting how the dust is obscuring a direct view of the bright star yet its light filters around it.

Greg.

November 10, 2007 11:18 PM Forum: CCD Imaging and Processing/Deep Sky

NGC6946 and NGC6939

Posted By Greg Bradley
Really nice image Tyler.

Greg.

December 5, 2007 07:21 AM Forum: CCD Imaging and Processing/Deep Sky

Latest Image, The Rosette Nebula.

Posted By Greg Bradley
Hey you're getting good!

Greg.

January 21, 2008 05:28 AM Forum: CCD Imaging and Processing/Deep Sky

Best 8" scope for CCD Deep Sky

Posted By Greg Bradley
For astrophotography you will find you will get best results from short focal length scopes. Longer focal lengths are harder and require more precision from your mount. Mounts like that are typically Takahashi, AstroPhysics, Losmandy and cost a lot. I know some are using an Orion EQ6 with good results and they are reasonably priced.

Get an 80mm APO refractor and an EQ6 and an Orion autoguiding camera and a little scope piggybacked for the autoguider. You will get better results than using an SCT with poor tracking and mirror shift and long focal lengths. It can be done but not easily.

Greg.

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