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For M45 I took 3 avi's of 1000 frames each through O-Y-B filters. Each avi was stacked separately in Registax with dark frame subtract (1000 darks stacked) and output to 16bit per channel TIFF files. Each of the 3 TIFF files had curves/levels applied in Adobe Photoshop 6 before going to Corel Photopaint 8 for removal of existing hot pixels that the dark in Registax didn't take out.. The 3 files were loaded back into Photoshop where each were matched with levels/curves/lasso in bright spots to make them as even as possible.
The next step for RGB combining is best described in this link http://www.employees.org/~jmulchin/lrgb.html
That's pretty much how I did it minus the luminance layer. The final RGB layer was flattened and final levels/curves/colour balance applied.
It only took 3 hours.
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