Opticstar AR90S Gold refractor telescope – 90mm – Travel case – Mint condition

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Opticstar AR90S Gold refractor telescope

The scope is in mint condition, perfect optics and has the dual speed crayford focuser

Excellent quality, fully broad-band multicoated refractor bought from Opticstar in Manchester just a few months ago. Intended to use as a travelscope, but due to change of plans now surplus to requirements.

Comes complete with padded travel case, mounting rings, dovetail bar and instruction manual.

Opticstar description and specs below:

Aperture90mmFocal ratioF/5.5Focal length495mmObjectiveAchromatic doubletOptical coatingsBroadband FMC (fully multi-coated)Optical tubeInternally anti-reflection coated, knife-edge bafflesDew shieldRetractable with metal screw-type capFinder-scope saddleYesFocuserDual speed CrayfordFocuser adapterAccepts 2″ and 1.25″ eyepieces and diagonalsFocuser tube travel70mm (marked in 1mm intervals)Tube ringsSingle wide tube ring with photographic 1/4″ threadTube weight (inc rings)2.2kg including single speed focuserMinimum tube length385mm with retracted dew-shieldMaximum tube length465mm with extended dew-shieldTube diameter97mmFrontal dewshield diameter110mm (screw-type aluminium cap)ConstructionAll metal constructionTube DesignShort, suitable for use with bino-viewersCaseNylon, padded
“The Opticstar AR90S Gold short-tube refractor is ideal as a portable scope and can be used for observing, imaging or as a guide scope. It uses a 90mm achromatic doublet that is fully broad-band multicoated to increase light transmission.
The optical tube greatly benefits from metal knife-edge baffles (not the plastic less effective step type) that prevent stray light outside the field of view from reaching the focal plane. Knife-edge baffles markedly increase image contrast.

The Crayford focuser, main tube and lens assembly are screwed into each other for maximum rigidity, no peripheral screws are used as they can compromise the rigidity of the telescope.

The AR90S Gold refractor features a smooth Crayford focuser with a 2 drawtube (with 1.25 adapter), retractable metal dew shield, CNC rings with 1/4″ photo tripod threads, broadband fully multi-coated optics and comes complete with a quality padded travel-case.     Lens.
With a focal length of 500mm (f/5.5) the AR90S is very well suited for wide field astrophotography, guiding as well as nature photography.

With a minimum total length of only 40cm and a large 90mm aperture the AR90S Gold is the perfect travel scope. All you need to start using the AR90S is a photographic tripod, diagonal and eyepieces.”

Will be delivered by courier 

No reserve price auction. 

Thanks for looking and happy bidding.

Category: Cameras and Photography:Telescopes and Binoculars:Telescopes
Location: Rye, East Sussex

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