The set of optics for
Ritchey-Chretien telescope RC500

Primary mirror diameter

508 mm

Primary focal ratio


Secondary mirror diameter

192 mm

Equivalent focal ratio


Equivalent focal length

4000 mm

Back Focus (from primary mirror surface)

355 mm

Primary to Secondary Spacing

994 mm

Primary mirror hole

120 mm

Primary mirror thickness

70 mm

Secondary mirror thickness

25 mm

Mirrors material

LK-7 (low expansion optical glass) Optionally optics from AstroSitall may be maintained

Optical accuracy

1/4 wave peak-to-valley of wave front in assembled system or better and 1/25 wave RMS or better, Strehl Ratio is 0.95 or is higher.
The interferometric test report is supplied with each optical sets

Coating of surfaces

Al + SiO2 (Quartz) overcoat


11000 EURO

Copyright © 2007