Imaged over 2 nights. Most recent night (15 Dec: 2.25hrs Ha -
Some details on "Ha" are in my blog, HERE), I
had corrected the backfocal distance for flattener from earlier outing.
Difference when Ha is added is only slight compared to origLRGB
and not as apparent as M33Ha
result from earlier in the year. For 6 Dec outing, here are my
original comments: Just used Tak flattener as reducer adapter I had
machined did not work out (backfocal distance was still a tad too long).
Believe not optimal backfocal distance here, either (coma at corners was
huge), so I still have some testing to do.