Vixen SX2 Mount with ED81S II Refractor Telescope and STAR BOOK ONE

No Ratings Yet

Write a Review

Item #VIX339-1

  • Your Price:
  • $3,499.00
  • + FREE Shipping

Leave us your email, and we’ll let you know when this item is back in stock.

  • Super Extra Low Dispersion optics for amazingly sharp views
  • 81 mm ED APO produces sharp images with no extraneous color
  • Medium f/7.7 focal length with decent field of view and contrast
  • Dual speed 1:7 focuser for fine focus ability
  • Perfect medium weight mount for loads up to 26.5 pounds
  • STAR BOOK ONE controller is autoguider ready
  • High precision wheels and worm gears on mount for accurate tracking
  • Built-in 6x20 illuminated polar scope helps with alignment
  • Mount “center of gravity” design lets it act as counterweight
  • Includes HAL130 tripod; legs extend from 32 to 51 inches
  • Comes with one 4.2 pound counterweight and DC power cable
Questions? Let our experts help!
  • Description

    The Vixen 25074DS consists of an 81 mm f/7.7 refractor with Super Extra Low Dispersion glass and the Sphinx SX2 equatorial mount. This is a great intermediate level dual-axis drive telescope package that can be upgraded to a Go To mount by simply changing out the hand controller! The Sphinx SX2 mount comes with the Star Book One hand controller for motorized control of both axes. A dual-axis drive telescope is great for visual astronomy, but it can also introduce you to the wonderful world of astrophotography. When combined with the a high quality 81 mm refractor, with its sharp, true color images, you’ll get a telescope that is great for both visual and imaging applications.

    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 Sphinx SX2 Mount

    The Vixen Sphinx SX2 Equatorial Mount is simple to operate and sets up in minutes. One bolt secures it to the tripod. Beginners and seasoned hobbyists will benefit from the portability of the Vixen SX2, the easy-to-use STAR BOOK One controller, and the ability to download future upgrades directly to the controller.

    The SX2 equatorial mount with dual-axis drive attaches to a variety of telescopes with the Vixen universal dovetail plate. The short profile declination head and internal motors greatly improve balance and motion around the RA axis, guaranteeing precise motor control. Small telescopes require no additional counterweights due to the internal placement of the the RA and DEC motors. The counterweight shaft retracts into the SX2 mount body for storage when not in use.

    STAR BOOK ONE & HAL-130 Tripod Features

    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 DEC). The controller includes a built in red LED light for illumination to avoid loosing night vision. Versatile tracking options are available; sidereal rate, Kings 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 HAL130 Tripod provides ample stability and has no wobble points in its design. The HAL130 has a large base to carry the Sphinx SX2 mount. The tripod extends from 32" to 51" (81cm to 130cm) and weighs 12 lb.(5.5 kg).

    Supplier SKU


    What's Included

    • Vixen ED81S II Refractor
    • Dual Speed (1:7) Focuser
    • Carry Handle
    • Flip Mirror Diagonal
    • Red Dot Finder
    • Tube Rings
    • Vixen-style Dovetail
    • Vixen Sphinx SX2 Equatorial Mount
    • Dual-Axis Motor Drive
    • One 4.2 lb. Counterweight
    • STARBOOK ONE hand controller
    • Starbook One cable and strap
    • Cigarette Plug Cord
    • HAL130 Tripod

  • Dimensions & Specifications

    Optical Design:

    ED Apochromatic Refractor


    81 mm

    Focal Ratio:


    Focal Length:

    625 mm

    Resolving Power:

    1.43 arc seconds

    Limiting Magnitude:


    Light Gathering Power:


    OTA Diameter:

    90 mm

    OTA Length:

    23 inches

    OTA Weight:

    5.1 pounds


    Flip Mirror


    Red Dot

    Mounting Type:

    Tube Rings and Vixen Dovetail

    Mount Type:

    German Equatorial



    Load Capacity:

    26.5 lb. & counterweights

    RA and DEC Slow Motion:

    Worm and Wheel Gears

    Wheels Number of Teeth:


    RA Slow Motion Axis:

    72mm diameter, aluminum alloy

    DEC Slow Motion Axis:

    72mm diameter, aluminum alloy

    Worm Gears:

    9mm, brass

    RA Axis:

    40mm diameter, aluminum alloy

    DEC Axis:

    35mm diameter, aluminum alloy

    Altitude Adjustment:

    0° ~ 70 degrees latitude

    Azimuth Adjustment:

    1.2° per rotation

    Number of Bearings:


    Counterweight Bar:

    20mm diameter, retractable


    4.2 lb.

    Motor Type:

    Pulse with 250pps


    12V DC, DC Adapter Included

    Mount Dimensions:

    13.5 x 14 x 5 inches

    Mount Weight:

    15.4 pounds without counterweights



    Controller CPU:

    32bit CISC Processor, 40MHz

    Controller Display:

    Two-line STN with backlight

    Controller Power Connecting Port:

    DC12V, Center Plus Polarity

    Controller Guider Port:

    6-pole, 6-wire modular jack

    Controller Dimensions:

    5.4 x 2.5 x .8 inches

    Controller Weight:

    3.88 ounces


    HAL130, adjustable from 32 to 51 inches

    Tripod Weight:

    12 pounds

  • Product Guarantee

    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.

    Manufacturer Warranty

    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.

  • Stars


    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars

    Most Helpful Reviews

    Most Critical Reviews

    All Reviews

    Displaying Reviews 1-10 of