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Vixen ED81S Telescope w/ AP-SM Mount has been discontinued by Vixen and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Telescopes yourself to try and find the perfect replacement for you!
An amazing tool that will both meet and exceed your observation needs, the Vixen ED81S ED Achromatic Refractor Telescope 39984 features "Super Low Dispersion Glass" in the objective lens. The SD Glass in the Vixen ED81S Refractor Telescope suppresses residual chromatic aberration far under the threshold of visibility producing sharp, high contrast images for both the visual observer and the astrophotographer. The Vixen ED81S Refractor Telescope features fully multi coated SD Glass to deliver clear and high contrast viewing, virtually free of false color. The combination of better color correction from the new SD glass and brighter images from its fast f/7.7 focal ratio will satisfy the most demanding visual astronomer or astro-photographer. The ED glass uses environmentally friendly glass technology. The optical tube is very stable yet light weight. Vixen's Dual Speed Focus, standard on the ED81 Refractor Telescope, provides fine focus adjustments for 1/7th speed focusing. For an outstanding way to be sure you have a top of the line telescope that won't let you down when you're expecting results, choose the Vixen ED81S Refractor Telescope w/ AP-SM Mount.![]()
| Aperture: | 81mm |
| Focal Length: | 625mm |
| Focal Ratio: | f/7.7 |
| Coating: | Multi Coating |
| Resolving Power: | 1.43 arc sec |
| Limiting Magnitude: | 11.3 |
| Light Gathering Power: | 134x |
| Finder Scope: | Optional |
| Focuser: | Dual Speed |
| Back Focus (from rear edge of focuser body): | 149.0mm |
| Back Focus with Reducer (from rear edge of reducer): | 63.5mm |
| Adapter Thread: | 60mm/50.8mm |
| Astrophotography: | Prime Focus, Eyepiece Projection & Afocal Imaging |
| Optical Tube Length: | 23" (585mm) |
| Optical Tube Diameter: | 3.5" (90mm) |
| Outside Dew Shield Diameter: | 100mm |
| Optical Tube Weight: | 5.1lb |
| Accessories: | Tube Rings; |
| Available Accessories: | Flip Mirror Diagonal; Dovetail Plate; Red Dot Finder; Carry Handle Specifications |
| RA Slow Motion/DEC Slow Motion: | Worm and Wheel Gears with 140 Tooth whole circle micro-movement |
| RA Axis: | 59mm diameter, aluminum alloy |
| DEC Axis: | 59mm diameter, aluminum alloy |
| Azimuth Adjustment: | Twin screw knobs About 1.4° per rotation |
| Altitude Adjustment: | Latitude between 0° ~ 65°,with a tangent screw bolts about 1.9° per rotation |
| Number of Bearings: | 7 Pieces- Ball Bearings |
| Counterweight Bar: | 20mm Diameter Steel |
| Counterweight: | 1.0 Kg |
| Optional: | Drive Motor |
| Optional: | Pulse Motor RA |
| Tracking/Slewing: | Manual Operation |
| External Power Supply: | Unnecessary |
| Loading Capacity: | About 13.2 lbs excluding counterweight |
| Tripod: | 6.6 lbs; Height 21-45.5" |