[ Bosma 220-2700 product photo ]
Release Date: 1970.12
brand: Bosma
type: Telescope
detail:
Telescope works: refractive focal length: 2700mm focal ratio: 12.3 Lens: 220mm Resolution: 0.53 inches arc second set of light power: 988 * limiting magnitude: 13.6 Eyepiece: Super PL10, PL25, PL40 ... Tripod: column type finder: F500 * 80 with PL40-seeking star ...
detail more:
Basic parameters
| Telescope works | Refractive | |
| Focal length | 2700mm | |
| Coke ratio | 12.3 | |
| Objective | 220mm | |
| Set of light power | 988 * | |
| Resolution | 0.53 inches arcsec | |
| Limiting magnitude | 13.6 | |
| The length of the primary mirror | 3000mm |
| Guide star mirror system | F1200 * 100 guide star mirror |
| Equatorial mount | Large fixed equatorial mount | |
| Finder | F500 * 80 with PL40-seeking star mirror | |
| Zenith mirror | 90 degrees zenith mirror (1.25 inches) | |
| Eyepiece | Super PL10, PL25, PL40 (1.25 inches) | |
| Filter | Moon Filter (1.25 inches) | |
| Star chart | 1 | |
| Tripod | Column Type | |
| Other accessories | Desiccant: 1 package rags: 100 * 100mm 1 pieces of guidance manual + observations: 1 copy of the manual electric tracker certificate: 1 |