astrosib

ASTROSIB RC400
(Optical tube assembled)

astrosib telescopes of ritchey-chretien system rc400
astrosib telescopes of ritchey-chretien system rc400

Primary mirror diameter

406 mm

Primary focal ratio

F/3

Secondary mirror diameter

160 mm

Equivalent focal ratio

F/8

Equivalent focal length

3200 mm

Back Focus (from primary mirror surface)

325 mm

Primary to Secondary Spacing

784 mm

Mirrors material

LK-7 (optical glass with low linear expansion coefficient). By preliminary agreement, the optics made of AstroSitall can be installed

Accuracy of the optics manufacturing

RMS deviation of wave front is no more than 0.04λ, Strehl criterion is no less than 0.95. The optics quality interferometric certificate is attached to every telescope

Focal plane position

225 mm from the rear end of the tube

External thread on the backside connecting flange

M 126x1.25. It is used for mounting field rotator, adapter rings, and other equipment

Internal thread on the backside connecting flange

M 111x1. It is used for mounting the ASTROSIB FFC16 corrector

Outer dimensions

510x560x1150 mm (the length 1150 mm is presented without regard for the installing of adapters and receiving equipment)

Mass of the telescope

45 kg


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