M27 in HOO colors

I took this on May 21 2007 with a DSI Pro and Lumicon Ha and OIII filters. Envisage was used to RGB merge them together into the HOO image shown. I can't figure out why I have a bunch of black dots throughout the images. I'm thinking that these are probably cold pixels as the temperatures dropped nearly 10 degrees from the time darks were collected to the time imaging was complete.

Anjal.

Attached Image:

Nice catch Anjal! 8)
Your image seems to be pulled a bit too much into the RED... probably caused by the Ha filter? (most people use Ha signal for luminance and not color, did you do this? or what method did you use?)

What scope was used for this image? and what exposure settings for each?


Thanks for sharing, and keep'em coming!