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Caldwell 27 - Crescent Nebula

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 Envisage.


31 60S Subs, Sorted in Nebulosity. 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 registered and joined in AIP4WIN 2.2 then exponential stretch on final image. Final finishing in Photoshop with colour balance shift and slight unsharp mask.


Taken on 24-10-2008


Seeing was reasonably good.

Original Photo
 

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  • Posted By: JonW
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  • Date/Time: 10-25-2008 2:23 PM

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