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Frodo - a 10 inch travel Dobson10 inch, f/4.8 newtonian |
 
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optics hogging out smoothing the curve polishing foucault tester figuring silvering |
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mechanics mirror cell wire spider focuser middle ring rocker box |
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| self made mirror | |
| material | Schott borofloat, provided by Stathis Kafalis |
| aperture |
10 inch, 254 mm |
| edge thickness | 24 mm |
| focal lenght | 1211 +/- 3 mm |
| focal ratio | f / 4.8 |
| telescope | |
| materials | mainly birch plywood (9,18 and 21 mm) and aluminium |
| weight | ca. 13 Kg overall |
| mirror | 2400 g |
| mirror cell | 1200 g |
| lower ring with cell and mirror | 3600 g |
| lower truss poles | 560 g |
| middle ring including altitude wheels | 2100 g |
| upper ring including focuser, spider and Rigel quickfinder | 1140 g |
| upper truss poles | 890 g |
| rocker "box" | 4630 g |
| dimensions in travel configuration | 48 cm x 46 cm x 16 cm |
© 2005 by Andreas Derwahl • contact