Posts Made By: Thomas V Davis

Thanks everyone for your kind comments.

Tom

Small, yes. Pretty, you bet! Well done!

Tom

Nice. I've never attempted that target.

Tom

Very nice mate!

Tom

Great detail for quick data!

Tom

Nice! I've never shot that one either.

Tom

Pretty!

Tom

Very pretty. Nothing bad about that image at all.
Tom

Nice, but the color combine is wrong. Don't use Ha as red; it will overwelm everything -- as seen here. Instead, shoot your usual RGB frames and combine them into a RGB image. Combine your Ha frames into a Ha master. Align the Ha master and the RGB image. Take them both into Photoshop and activate the Ha image. Select all/copy. Then activate the RGB image. Open your channels pallete and select split channels. This will give you R,G,B grey scale frames. Activate the Red frame. Paste. In the Layers palette change the blend mode to lighten -- leave the opacity at 100%. Flatten. Next, activate the Blue frame. Paste. Again change the blend mode to Lighten but this time reduce the opacity to about 15-20% (this simulate H-beta). Flatten. Go back to your channels palette and select combine. Choose the RGB option and make sure your R,G,B frames are seleted properly. Click OK.

You now have a HaRGB image with all the detail of the Ha, but proper color fidelity of the RGB. This is the "standard" way to combine Ha into a RGB image.

Chris Schur gave a presentation regarding this technique at AIC in 2006. Click on the link then download his Powerpoint presentation "Getting the Right Color"
http://www.aicccd.com/archive/2006_presentation_archive.html

Tom

Yes, an interesting object for sure. I've been wanting to re-image it for a few years now but have not had the weather to do so.

Tom