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At the center of the dobsonian secondary
system there is the conjuntion of Jupiter, Saturn and the Pleiades. The
telescope is a 50cm f/4.5 dob of one of my friends: Fabio Marioni.
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| Optics | Photographical objective |
| Focal Lenght | 50 mm |
| Focal Ratio | f/1,8 |
| Exposure Time | 1 min exposure |
| Film | Kodak PJ-400 |
| Developement sensibility | 400 ISO |
| Location | Colle del Nivolet (AO, in the Italian Alps) at 2600m |
| Date and time of exposure start | 29 july 2000, about 1.45 UT |
| Mount | Fixed tripod |
| Tracking | - |
| Notes | - |
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