Telescope: Skywatcher 8" f/5 Newtonian
Focus: Prime focus
Camera: SAC7B, uncooled
Exposure: 147 x 25s
Date: 23rd May 2003
Processing: Acquired in K3CCDTools as
AVI. Stacked in Iris. YRGB image, composited in Photoshop.
Colour enhanced using Multiple Luminance Layering.
Processed using the YRGB technique. During the later
stages of curve stretching in Photoshop the brighter stars were prevented
from bloating by de-selecting them.
Most of of the characteristic diagonal banding noise from
the SAC7 camera has been removed through subtraction of a 'banding flat' -
see the Advanced Processing page.
Colour saturation was increased using Multiple Luminosity
Layering. The smaller galaxy, NGC 5195 is noticeably more yellow, and
the dust lanes a brownish red. Some star colours