M57 is the famous "Ring Nebula", in the constellation Lyra. It is a planetary nebula. The star visible at its center is a white dwarf, an incredibly hot and dense star.
• Date: September 28, 2002
• Exposure: 60 minutes + 60 minutes
• Telescope: 10" LX-200 f/10
• Guiding: SBIG STV
• Camera: Olympus OM-1
• Film: Kodak Supra 400 (not hypered)
• Scanned: Hewlett Packard S20
• Processing:
Two images combined in RegiStar using the "min" combine function. Adjusted curves
and levels in Adobe Photoshop 6.
The original negatives of this image had many scratches and other marks. I used the "min" combine function in RegiStar to remove these blemishes. Since the scratches were lighter than the sky background, the min function chose the darker sky pixels over the scratch pixels. To see what the image looks like using the "average" combine function, click here.
