View Single Post
  #19  
Old 28-08-2005, 03:30 PM
cometcatcher's Avatar
cometcatcher (Kevin)
<--- Comet Hale-Bopp

cometcatcher is offline
 
Join Date: Jan 2005
Location: Cloudy Mackay
Posts: 6,542
Quote:
Originally Posted by Striker
...I wish I new what this means "Its about 90 min Luminance Data"
The picture is an LRGB (Luminance, Red, Green, Blue) composite. Each colour channel is imaged separately and combined later. The luminance channel has no colour information and is usually the bulk of the exposure since it contains the um.. luminance part of the picture. The luminance channel can also be filtered but usually isn't for natural effect.
Reply With Quote