The Vixen 39984 consists of an 81 mm f/7.7 refractor with Super Extra Low Dispersion glass and the Advanced Polaris-M Equatorial Mount and Tripod. This is a great intermediate level portable telescope package! The AP-M mount comes with an RA motor and Star Book One hand controller, giving you motorized tracking of objects as they move horizontally across the sky. You can also add a Declination motor module whenever you like—the Star Book One is capable of controlling both. And since it is super easy to attach and remove the optical tube assembly, you can add a different style telescope when you want to change it up a bit. In the meantime, enjoy views of hundreds of celestial objects with this quality telescope, and have fun using this very smooth, well made equatorial mount!
About the ED81S II Refractor Telescope
The Vixen ED81S II is the SD Glass Scope that travels with you. This ED refractor features fully multi-coated ”Super Low Dispersion Glass" in the objective lens. The SD Glass in Vixen's ED81S Refractor Telescope suppresses residual chromatic aberration far under the threshold of visibility, producing sharp, high contrast images. 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 new ED glass uses newly developed, environmentally friendly glass technology. The optical tube is very stable yet light weight. Vixen's new Dual Speed Focuser, now standard on the ED81 Refractor Telescope, provides fine focus adjustments for 1/7th speed focusing.
About the Vixen Advanced Polaris M Mount
The Vixen Advanced Polaris-M is an easy to use German equatorial mount that is designed to be easily transformed into a variety of configurations. This classic equatorial mount includes the RA Motor module, STAR BOOK ONE hand controller and an adjustable tripod.
The STAR BOOK ONE Controller is a dual axis handheld controller. The 4 buttons on the controller move the mount electrically in the X and Y axis (RA and, if you buy the Dec Motor Module, in DEC). The controller includes a built-in red LED light for illumination to avoid loosing night vision. Versatile tracking options are available; sidereal rate, King Rate, lunar rate, and solar rate. Different tracking speeds are available for time lapse photography. The controller works in both the northern and southern hemispheres. Backlash compensation provides reduced time lag at the point of reverse motion and the controller can be used for auto guiding with an auto guider compatible with SBIG auto guiders. PEC rectifies irregular motion of the tracking gear wheels that affect long exposure astrophotography.
The Advanced Polaris-M German Equatorial Mount is ideally suited for both beginners and experienced observers who want simple equatorial mount with a easy-to-control right ascension drive. To add dual-axis drive functionality to this mount, we recommend adding the DEC Motor Module, which is sold separately.
The Vixen Advanced Polaris-M Mount securely supports the ED81S II telescope for comfortable night sky observing. The mount can be quickly moved to your target object in right ascension via the Star Book One controller, or manually in either RA or Declination, and has slow motion controls on both RA and Dec that allow for smooth manual movements once your choice of object is in the field of view. A wide selection of accessories and modules (including a DEC Motor Module) are available to customize the Advanced Polaris mount further. This EQ mount also comes with the Vixen AL130 Tripod and a 2.2 pound counterweight.
- Vixen ED81S II Refractor
- Dual Speed (1:7) Focuser
- Carry Handle
- Flip Mirror Diagonal
- Red Dot Finder
- Tube Rings
- Vixen-style Dovetail
- Vixen Advanced Polaris-M Equatorial Mount
- RA Motor Module
- Starbook One Controller & Cable
- 2.2 lb. counterweight
- AL130 Tripod
Dimensions & Specifications
ED Apochromatic Refractor
1.43 arc seconds
Light Gathering Power:
Tube Rings and Vixen Dovetail
RA and DEC Slow Motion:
Worm and Wheel Gears
Number of Teeth:
59mm diameter, aluminum alloy
59mm diameter, aluminum alloy
0° ~ 65 degrees latitude
1.4° per rotation
Number of Bearings:
RA Motor Module
RA Tracking/ Slewing:
Via Star Book One controller
Micro USB or Battery Pack (sold separately)
AL130, adjustable from 21 to 45.5 inches
We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.
Default manufacturer warranty.
Return & Exchange Policy
At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.