M55 in Sagittarius


Scope: C8 f/5; Location: Dos Picos Park, Ramona, CA;  6 Aug. 2004; Camera: ToUcam SC3

Exposure: 12 x 30 sec and 12 x 12 sec Luminance exposures with IR Block Filter,   12 x 15,15,18 sec R,G,B 

Processing: Images were captured in K3CCDTools. Aligned/stacked in Registax and saved as FITS. Luminance and Color channels were scaled and rough color balanced in Astroart. Channels were co-registered in Astroart. The 30 sec  exposure was used as the base Luminance channel. The shorter Luminance exposure was normal combined with core mask to desaturate and sharpen the core in the Luminance channel. Luminance and Color FITS were combined in Photoshop with Luminance Layering. Color balancing and final touches in Photoshop. SGBNR was used to smooth background noise on the luminance channel and the final result. Resized to approximately 800x600.

This image was guided. The different exposure levels helped to desaturate the core and improve star resolution on the core stars. This image replaces an earlier image that can be seen in the Archives here.  Horizontal FOV is 16'


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