|
Technical Data
|
| Optics |
Takahashi FS-128 refractor |
| Focal Length |
1040 mm |
| Focal Ratio |
f/8.1 |
| Exposure Time |
57 minute. exposure |
| Film |
un-hypered 35mm Kodak E200 slide film pushed +1 stop |
| Processing |
Enhanced in Adobe Photoshop 5.5 |
| Location |
Berkshire, New York |
| Date
start |
6/20/2002 & 7/11/2002 |
| Mount |
Mountian Instruments, MI-250 NON=GOTO |
| Tracking |
ST4, A3 average correction |
| Temperature |
60F |
| Notes |
The Ring Nebula - NGC6720 - Planetary nebula in constellation Lyra, Mag=9.0 Distance: 2,300 light years. The center star is planet-size white dwarf @ 15th magnitude.
|
