Opticstar AR80S GOLD GUIDE-SCOPE, Owner'S Manual

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© Opticstar Ltd 2011
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APPENDIX C
Opticstar AR80S OTA Specification
Aperture 80mm
Focal ratio F5 F7.5
Objective Achromatic doublet
Optical coatings Broadband FMC (fully multi-coated)
Optical tube Internally anti-reflection coated, knife-edge baffles
Dew shield Retractable with metal screw-type cap
Finder-scope saddle Non guider versions only
Focuser 1:10 precision / Crayford 1:10 precision
Focus adapter Accepts 2” and 1.25” eyepieces and diagonals
Focal tube travel 70mm (marked in 1mm intervals)
Optical tube supoprt Rings & dovetail / dovetail & rotatable focuser
Scope weight 2.1 - 2.2Kg 2.3Kg
Minimum tube length 310mm retracted dew-shield 330mm retracted dew-shield
Maximum tube length 365mm extended dew-shield 385mm extended dew-shield
Tube diameter 97mm
Frontal dew shield diameter 110mm (screw-type aluminium cap)
Construction All metal construction
Tube design Short, suitable for use with bino-viewers