Observatory.jpg (76333 bytes)


M57 - Ring Nebula 

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(Click here for Full Size - 293K)

Acquisition Details:

Telescope:  12.5" Ritchey-Chretien @ F9

Camera:  ST10-ME, CFW8, AO-7

L=6x10min, binned 1x1, Anti-Blooming Filter, Median Combine w/Norm, CCDSharp 5 iterations

R=3x10min, binned 2x2, Median Combine w/Norm, Double-Size

G=3x10min, binned 2x2, Median Combine w/Norm, Double-Size

B=3x15min, binned 2x2, Median Combine w/Norm, Double-Size

Final Image Processing: Combined LRGB in MaxImDL, created two layers in Photoshop, gamma stretch to top layer using histogram midpoint to bring out the dim stars and galaxies, revealed ring from lower layer using lasso/expand/feather/eraser technique.


 

 

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Copyright 2002 Gilbert Jones
Last modified: November 13, 2004