Saturn – A Comparison of Stacked Images

Camera: DMK 21AU04.AS Monochrome USB astronomy camera (1/4 ” CCD, Sony ICX098BL) resolution 640 x 480 pixels.
Filter: Astronomik Pro Planet 742nm IR pass
Telescope: Orion Optics AG12 300mm F3.8
Software: Registax 6

The two small images were with a x2 barlow lens and the larger image with a Televue x5 barlow. The latter provides a larger (but fainter image) resulting in a longer exposure time of 1/15 second – image quality is lost in this image. A larger number of stack  images seems to provide a better end result.

Saturn 4000 stack 6 June 2013 (x2 barlow)

Saturn 2400 stack 7 June 2013 (x2 barlow)

Saturn 2400 stack 7 June 2013 (x5 barlow)