8" Meade LX-90 GPS with standard wedge
Meade DSI IIIc with Meade F6.3 Focal Reducer + 30mm Extension. Autoguided with Starlight 80 + DSIc with 1.4S update rate in PHD.
14 240S Subs, Sorted by eye, dark subtract done on the fly in Envisage, flat frame, bias calibration and stacking done in AIP4Win 2.2 for each individual LRGB channel. Calibrated channels then exponentially stretched, registered and joined in AIP4WIN 2.2 using join colours tool. Final finishing in Photoshop with slight unsharp mask.
Taken on 22-05-2009
Seeing was reasonably good.
Same data as previous post, but much more subtle processing used. The exponential stretch in each colour channel is a far better approach.