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Douglas Rollain

Lion Nebula SH2-132 - RC71

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Posts Made By: Jim Thommes

April 17, 2005 08:30 PM Forum: CCD Imaging and Processing/Deep Sky

M16 at f/10

Posted By Jim Thommes
Kirk,

This is a great image. Are you planning on doing more with subframes and color?

April 17, 2005 08:36 PM Forum: CCD Imaging and Processing/Deep Sky

M82 w/ STL-1100Xm and Meade 16"

Posted By Jim Thommes
Jeff,

Lovely, lovely image. I don't see how it could get much better. Thanks for sharing

April 18, 2005 03:02 AM Forum: CCD Imaging and Processing/Deep Sky

NGC 3521 Galaxy

Posted By Jim Thommes
Thanks Ken and Ivan for your comments

April 18, 2005 07:52 PM Forum: CCD Imaging and Processing/Deep Sky

New NGC4565

Posted By Jim Thommes
Larry,
Great image - even more impressive that it is unguided.

You can remove a good deal of the gradient on the stacked image with the DBE tool (Dynamic Background Extraction) in PixInsight LE - its free. see:

http://pleiades-astrophoto.com/pixinsight/

April 18, 2005 07:58 PM Forum: CCD Imaging and Processing/Deep Sky

And an M3

Posted By Jim Thommes
Larry,
Nice detail on the glob. I think you got a bit too much red.

April 20, 2005 04:58 AM Forum: CCD Imaging and Processing/Deep Sky

Open Cluster NGC2353

Posted By Jim Thommes
Larry, Kevin, Thanks for the comments.

April 22, 2005 02:48 AM Forum: CCD Imaging and Processing/Deep Sky

FS152 Omega Centauri

Posted By Jim Thommes
Greg,
My, You have been busy!

Great images that you have posted - lots of nice detail. Nice colors on Eta and M42. It does seem like OmCent and the Jewel Box did get a little blue.

April 24, 2005 11:45 PM Forum: CCD Imaging and Processing/Deep Sky

M51 with my working autoguding!

Posted By Jim Thommes
Tom,
Congrats on the guiding and on the images! I guess with cooperative weather we should be seeing more of your images with your set up. Looking forward to them!

April 25, 2005 08:56 PM Forum: CCD Imaging and Processing/Deep Sky

Galaxy NGC 2841

Posted By Jim Thommes
Don, Jeff, and Ivan,
Thanks guys for the comments on the image. I have worked hard with the webcam - this is the year I think I will move up to something more sophisticated (I hope, I hope).

April 27, 2005 02:52 AM Forum: CCD Imaging and Processing/Deep Sky

Introduction

Posted By Jim Thommes
Duncan,

Welcome and thanks for sharing the images. They are quite good - some of my first images are quite amusing.

I have owned Orion Equipment as well - just sold my StarMax 127 sad . So I have had some experience with the EQ3 as well. I never tried to autoguide with it, but I do remember the DEC backlash could be daunting. You may have heard of the "East side heavy" technique for RA. You can do something similar in DEC by deliberately offsetting your polar alignmnet a tad and then unbalancing DEC a little so the DEC drift correction is preloaded against the weight of the DEC unbalance. I know, its a Rube Goldberg approach, but it might be worth a try.

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