This version of the Dumbell
Nebula was taken from my driveway under clear, but mag 3.5 skies! As a
result, 134 minutes of total exposure was used through an IDAS filter
on the 12"SCT. Some evidence of field curvature is also evident on
this cropped image. The scale is rather large, owing to the f/5.65 speed
on the 12". Guiding was performed by the Tak Sky90, 2x barlow and
the MX7C camera.
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Image info:
12"LX200 on a Losmandy
Titan Mount
Starlight Express
SXV-H9C
67x2 mins
f/5.65 (15 mm spacer used)
Stacked and processed in Astroart
guided with the MX7C on a
piggybacked Sky90 refractor with 2x barlow