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M20 Colour
Mike - The purple colour wasn't planned it just arrived - I thought I had screwed up something again but when I thought about it - it is just possible that it may be real. The image is deep - some of the luminance images are 20 min with a ST8 - the blooms had to be seen to be believed - they were the full length of the chip - also taken were 2 hrs of HAlpha and 2 hrs of OIII - but they were not used - original intention was to boost the faint outer ring nebula using the OIII - only problem is that there is very little OIII in the nebula at all. The outer ring shows up in the Ha exposures and my guess that the rest is HBeta (Blue) hence the purple colour. As for the noise - that problem was easy to solve - the first time I over processed the image - it also destroyed data - the second time I only processed where necessary - My P/S skills are only minimal but I am learning all the time - I think my images are improving.
Paul - The black line up the top is the result of not cropping the image - I didn't want to risk cutting the bright star in half - The image is a composite of 4 colour images and 4 luminance images all taken over 4 differnt nights over a period of 2 months - I have to pull my telescope down each night so the camera was not exactly aligned each time - a rotator would have cured that problem and it is on my wish list - but I'm still short a few Brownie points after buying the telescope.
Cheers
Geof
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