Jeff Terry's Astrophotos/m22tenminstretchlrgb.jpg

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This image of M22, my favorite globular cluster, was collected on Dennis Persyk's Takahashi E-160 f/3.3 scope with my SXV-H9C camera.

The iCCD software (Mac OS X on a Powerbook G4) was used to collect the image and to do the color processing.

These images are stacks of 5 2 minute unguided images. The rgb images were stacked using the program,

Keith's Image Stacker. Final adjustment was done with Photoshop. The third image has a weak histogram stretch,

the fourth image has a moderate histograms stretch, and the fifth image has an extreme histograms stretch.

The second image is a blended composite of the third and fifth images.

I have now added an image (top) using the ddp routine in iCCD. I believe that this is now the best image.

Compare the two top images. It is amazing what digital development can do.