M91
Click on photo for a larger image.
| Object Notes: |
|
| Instrument: | Ritchey-Chretien 32" Telescope |
| Focal Ratio: | f7.2 (prime focus) |
| Camera: | SBIG STL-11000 CCD camera
(See product review in July, 2004 issue of Sky & Telescope magazine.) |
| Exposure: | 12 x 5 minutes Luminance unbinned 3 x 5 minutes each R/G/B unbinned |
| Guiding: | Off-Axis with STV Autoguider
(Santa Barbara Instrument Group) (See product review in May, 2003 issue of Astronomy magazine.) See Photo/Guiding Equipment. |
| Date: | 4/13/05 |
| Post Processing: | CCDSoft, CCDSharp, MaxIM DL, Photoshop CS |