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Opticstar AR80S Guidescope
Portable Refractor with Collimating Rings for Auto-Guiding
To order this item outside the United Kingdom, please contact us.
Opticstar AR80S Guidescope
Opticstar AR80S Guidescope.
  • Lens diameter: 80mm
  • Focal ratio: f/5
  • Achromatic refractor
  • Fully multi-coated doublet
  • Retractable dew shield
  • High quality all-metal construction
  • Crayford 2" & 1.25" focuser
  • Knife-edge baffles
  • Collimating rings included
  • Dovetail included (Vixen/Skywatcher type)
  • 2" Extension tube included
Opticstar Visual
Opticstar Mount
CCD Cameras
Opticstar AR80S Guidescope
Package includes:
Order No. Price (inc_VAT) Shipping Delivery click button to purchase
OSRAR80SGS £ --- £ ---
AR User Manual
AR Guidescope
Opticstar CCD Cameras

The AR80S Guidescope kit consists of the Opticstar AR80S telescope, set of collimating rings and Vixen type dovetail to mount the telescope to standard mount saddles as found on the Sky-Watchers, Celestron CG-5, Vixen and other mounts.

Opticstar AR80S Guidescope

The Opticstar AR80S 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 80mm 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 AR80S 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, and broadband fully multi-coated optics.

With a focal length of 400mm (f/5) the AR80S is very well suited for wide field astrophotography, guiding as well as nature photography.

With a minimum total length of only 40cm and 80mm aperture the AR80S Gold is the perfect travel scope. All you need to start using the AR80S Gold is a photographic tripod, diagonal and eyepieces.

Opticstar AR80S Guidescope

Specification of Opticstar AR80S Guidescope
Aperture 80mm
Focal ratio F/5
Focal length 400mm
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 No
Focuser Single speed Crayford
Focuser adapter Accepts 2" and 1.25" eyepieces and diagonals
Focuser tube travel 70mm (marked in 1mm intervals)
Tube rings Collimating rings
Tube weight (inc rings) 2kg with single speed focuser or 2.1kg with dual speed focuser
Minimum tube length 310mm with retracted dew-shield
Maximum tube length 365mm with extended dew-shield
Tube diameter 97mm
Frontal dewshield diameter 110mm (screw-type aluminium cap)
Construction All metal construction
Tube Design Short
Case none
All information correct at time of writing.

Mounting on Schmidt-Cassegrain Telescopes (SCT)
The AR90S can be mounted on top of SCT telescopes with the Farpoint mounting rings, dovetail accessory adapters and dovetail plates as shown below.
Mounted on SCT.
Opticstar refractor shown mounted on fork-mounted SCT telescopes.
A & C Farpoint Scope Rings 125mm and Dovetail Adapters.
B Farpoint Dovetail Plate for Meade SCT.
D Farpoint Dovetail Plate for Celestron SCT.

The following table lists a number of accessories that may be of interest to some customers.
Vixen-Style dovetail accessories
Image Product Page Description
Sky-Watcher Equatorial Mounting Plates Dovetails of various lengths, to attach optical tubes to Vixen-style equatorial mounts
Opticstar Mini Dovetail - Vixen-style Compact dovetail to attach small optical tubes to Vixen-style equatorial mounts
Opticstar Short Dovetail - Vixen-style Short dovetail to attach small optical tubes to Vixen-style equatorial mounts
Losmandy-Style dovetail accessories
Image Product Page Description
Farpoint 125mm Scope Rings and Dovetail Adapters, Losmandy-style Collimating rings and two adapters for Losmandy-style dovetails to mount refractors on mounts such as the Celestron CGEM, GGE Pro, Losmandy, etc (dovetail plate not included, please see below).
Farpoint Dovetail Plates for Celestron SCTs, Losmandy-style These plates mount onto existing holes on the Celestron Schmidt-Cassegrain telescope tube.
Other accessories
Image Product Page Description
Opticstar 1.25" Extension Tube Used to achieve focusing with long focal length eyepieces where focal travel on the telescope is limited.
Opticstar 2" Extension Tube Used to achieve focusing with long focal length eyepieces where focal travel on the telescope is limited.
Opticstar M48(M) to 2" Nosepiece Nosepiece for 2" drawtubes with a male M48x0.75 thread at the back. Threaded for filters. Can be used to attach DSLR cameras to the telescope (also requires the appropriate M48 ring adapter).
Opticstar T-thread to 2" Nosepiece Adaptor A T-thread (Male, M42 x 0.75) to 2" push-fit nosepiece. Threaded for filters. Can be used to attach DSLR cameras to the telescope (also requires the appropriate M42 "T-ring" adapter).
DSLR to T-thread(F) Adaptors A T-threaded ring (Female, M42 x 0.75) fits on Canon, Nikon, Sony and other DSLR cameras. Can be used to attach DSLR cameras to the telescope (an additional M42 to 2" Nosepiece may be required).
DSLR to M48(F) Adaptors An adapter rings (Female, M48 x 0.75) that fit on Canon, Nikon and Sony DSLR cameras. Can be used to attach DSLR cameras to the telescope (an additional M48 to 2" Nosepiece may be required).

We are constantly checking the accuracy of the technical data. We are prepared to provide more detailed information on request. Technical data is subject to change without notice.

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Promotional Offer
Cash Back on Opticstar
Imaging Products
updated: 8th September 2017
Opticstar cashback offer.

Customers who purchase any Opticstar telescopes, Opticstar optical tubes or Opticstar mounts listed on this page qualify for a 10% cash back on any Opticstar astronomy cameras purchased at the same time or at a later date.

This offer is valid for 1 year commencing on the date that the Opticstar product is purchased from the Opticstar website or the Opticstar showroom.

Any additional purchases at a later date of Opticstar products that qualify for this offer will renew the cash back period to 1 full year.

Opticstar astronomy cameras that qualify for this offer include the following: Once an Opticstar CCD or CMOS camera has been purchased within a year of the qualifying Opticstar purchase, the cash back can be claimed by contacting Opticstar by email or over the phone quoting the receipt number(s). Please allow up to 14 days to process the payment.

Sample Images
Opticstar DS-145M ICE
posted: 13th March 2009
Sample image.
The M20 nebula shot by John Haunton with the Opticstar DS-145M ICE.
We want to hear your comments.
Sample Images
Opticstar DS-335C ICE
updated: 20th August 2010
Sample image.
The M42 nebula shot by Peter Shah with the Opticstar DS-335C ICE.
Opticstar Imaging
posted: 26th February 2013
Opticstar telescopes for imaging.
High quality refractor telescopes, bundled with CCD cameras for deepd sky imaging, planetary video imaging and auto-guiding.
A&M 80mm f/6 Review
"Best Of Breed"
updated: 25th March 2009
A&M 80mm f/6 A&M/TMB.
The A&M 80mm f/6 A&M/TMB has been reviewed in Cloudy Nights and it has been hailed as the "best of breed". The review concludes by saying "offers stunning performance while standing out from the crowd, look no further".
Willmann Bell
Books for Astronomy
updated: 6th September 2021
Willman Bell books.
Acclaimed books from Willmann Bell...
© Opticstar Ltd 2021