Crescent Nebula with Canon 60Da

This shot was taken at the Nova East star party in 2014. The exposure was cut short by a drastic drop in the transparency. This is a reprocess of the data using a statistical filter I've developed that replaces a pixel value with the mean of the kernel if the present value is below the average. The filter can be implemented in any layer capable image processor that has blend modes and an averaging filter. The filter allowed a high quality mask to be made for all masked stretches and it is able to reduce noise with very little loss of detail.

Object NGC 6888 (Crescent Nebula) RA 20:12.1 Dec 38:21
Exposure 39 minutes (13 X 3 minutes)
ISO 1600
Camera Canon 60Da DSLR
Optics Prime focus of a 200mm SkyWatcher f/5 Newtonian reflector with a Televu Paracor for a total focal length of 1150 mm
Location

Nova East Star Party, Smily's Park, Nova Scotia

Processing This image was processed entirely in Images Plus . Calibration, stacking and initial statistical filter applied then a masked stretch using the arcsinh function. The feature mask was used to split the stars and the nebula then several iterations of masked curves followed by the statistical filter. Finally the red was boosted then the nebula was recombined with the stars.