Rosette Nebula in Ha

[DJScotty (Scott)]

3 hours of 30 minutes subs
510mm FL through ED80 (0.85 focal reducer/flattener)
Taken with Atik 11000 cooled to -5C
Mounted on AZEQ6
Guided with PHD and 400mm F5 scope with Atik 314M



Full version here
http://www.astrobin.com/138910/
Thanks for looking
DJ Scotty

[RickS (Rick)]

Star shapes look a bit funky but a nice job overall, Scott!

[DJScotty (Scott)]

Thanks Rick.
I am pretty sure its because of the 1kg deadweight sitting on the end of the ED80 called the Atik 11000. Scope very much out of balance in dec.
Bought myself a set of 1kg wrist weights from BigW and wrapped them around the end of the dew cover. Will test it out when these damn clouds disappear.

Once again, thanks Rick

[RickS (Rick)]

That's a big camera on a small scope, Scott. I wouldn't be surprised if the image circle of the flattener/reducer is smaller than the sensor too.

Cheers,
Rick.