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Hello,
Please excuse this CCD post on
the APML but thought you might be interested to see the mantel that shows up in
the red exposure (working on the G and B...) of the very common M57... the
density difference is something like 1:1000 between the mantel and the "regular"
part of M57... if I did not burn down the central part it would be pure white.
Have a good
one,
Tony
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