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   Astrosib telescopes: Astrosib RC-250

Ritchey-Chretien Astrosib RC-250. Mirror material: low expansion glass LK-7. 80mm image circle (for 60x60 film photography). Includes tube holder and plate, 13x80 finderscope, thread adapters and 2" star diagonal, off-axis guider (accept standard 1.25" eyepiece or CCD auto-guider).

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Standard Specification

Aperture, mm

250

Focal length, mm

2000

Focal ratio

1:8

Optical scheme

Ritchey-Chretien

Focuser

Helical

Weight of the tube, kg

15

 

Astrosib RC-250
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