The telescope was custom designed and manufactured by AstroOptik in Regensburg.
Location
- Coordinates: 17d 38' 51.8" E, 59d 50' 14.9" N
- Altitude: 51 m
Optical information
- Cassegrain optical system
- Lomo Sitall optics
- 900mm free diameter of primary mirror
- 920mm mechanical diameter
- Primary mirror L/5 PtV wave
- Primary focal ratio f/3
- Uncorrected system focal ratio f/10
- Energy concentration of PSF 80% within 0.65 arc seconds in both foci
- 35% central obscuration
- Al+SiO2 coating on the main mirror
- Al+dielectric coating (95%) for Cassegrain mirror
- Al+dielectric coating (95%) for the tertiary mirror
- All refractive elements coated with an Multilayer-AR coating of R<0.5% for 400-700nm and R<1% for 400 nm to 1100 nm per surface
- All inside lens holders, filter wheel, de-rotators, baffles and telescope tube
structure black painted with 3M Nextel Velvet paint
- Nasmyth focus f/10 without corrector
- Nasmyth 1 focus with removable f/5 4-lens reducer for 40mm field, better than 15 microns RMS
- Nasmyth 2 focus with removable f/10.5 2-lens corrector for 100 mm field
- Both uncorrected foci diffraction limited
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