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Old 21-February-2008, 09:12 PM
RickJ RickJ is online now
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Default M51 Re Re processed

Dietmar pointed out I had too much green in the image. Over time my processing CRT had aged and needed recalibration to Photoshop. Something I'd not thought of. This learning curve keeps throwing me curve balls! Turns out I'd made a math error in calibrating the RGB images for scattering of shorter wave lengths. I'd transposed two numbers when calibrating the green image. My CCD/filter combination is most sensitive there so I need to tone it down a bit but I used a divisor of 1.23 instead of 1.32. At least this has been processed with the 1.32 divisor after recalibrating the CRT and looks much better. I tried 1.23 divisor and got similar results to the posted image. For many years I practiced tax law as a CPA. You'd think I'd know about transposed digits! Oh well. Here's the revised version.

For those who are waiting for an eclipse shot from me I don't have equipment suited for that. I was going to try my wife's Canon with its 10x optical zoom on a tripod but the cold temps, -27C, killed the camera or its freshly recharged batteries. It wouldn't even turn on. I put in fresh alkaline batteries and it woke right up. 20 seconds later the CCD view screen went dead. Worked fine in the house but not at -27C. So watched it though my french doors which have 6 foot wide windows. Almost like being outside but a lot warmer. Glass is tempered by law and way too wavy for pictures.

14" LX200R, L=6x10', RGB=2x10', STL-11000XM, Paramount ME

Same image with less compression is at:
http://www.spacebanter.com/attachmen...tid=1704&stc=1

Rick
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File Type: jpg M51L6X10RGB2X10-5a-7.jpg (144.4 KB, 31 views)

Last edited by RickJ; 23-February-2008 at 05:54 AM. Reason: Added link
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Old 21-February-2008, 09:38 PM
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Veeger Veeger is offline
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This one nails it Rick. Awesome!

Best regards,
Veeger

Last edited by Veeger; 22-February-2008 at 03:04 AM.
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