Vixen Optics ED81S Refractor Telescope with SX2 EQ Mount, Dual Speed Focuser, and Tripod

Vixen Optics ED81S Refractor Telescope with SX2 EQ Mount, Dual Speed Focuser, and Tripod

Vixen Optics ED81S Refractor Telescope with SX2 EQ Mount, Dual Speed Focuser, and Tripod

B&H # VIED81SDSSX2 MFR # 25074DS
Vixen Optics ED81S Refractor Telescope with SX2 EQ Mount, Dual Speed Focuser, and Tripod

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Product Highlights

  • 625mm f/7.7 APO Refractor
  • 81mm Aperture
  • Super Low Dispersion Glass
  • Dual Speed Focuser
  • Carry Handle
  • Motorized Mount with Hand Controller
  • Vixen Dovetail Saddle with 27 lb Payload
  • Star Book One Hand Controller
  • Celestial, Solar, and Lunar Tracking
  • Adjustable-Height Aluminum Tripod
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  • 1Description

This ED81S Refractor Telescope bundle from Vixen Optics includes four main components, a telescope, a tripod, a mount, and an electronic hand controller. These items are combined to create a capable and user-friendly rig for celestial object viewing.

Vixen's ED81S Refractor Telescope is an apochromatic refractor with a focal length of 625mm and an aperture of 81mm. It combines the assets of "Super Low Dispersion" glass in the objective lens and a fast f/7.7 focal ratio to deliver clear, wide-field deep-sky imagery. The SD glass lenses produce a crisp, high-contrast field of view that is virtually free of false color. They are capable of focusing the visible spectrum with accuracy and chromatic aberrations are minimized as well.

The ED81S is extremely stable yet it only weighs 5.1 lb. It is fitted with 90mm mounting rings. A dovetail plate is provided, as well as a carry handle. This bundle includes Vixen's 20mm SLV Series 1.25" Eyepiece, a 5mm SLV Series 1.25" Eyepiece, plus a flip mirror diagonal to enable accurate, visual framing and focusing for astrophotography. On the ED81S, the 20mm eyepiece provides 31.25x magnification, while the 5mm eyepiece provides 125x magnification. The flip mirror diagonal can be configured with one of the included eyepieces and a camera. When an interesting object has been located, the Vixen Dual Speed Focuser offers a quick, or a fine 1/7th speed focus for critical observation.

Made for long observation sessions, Vixen's Sphinx SX2 Equatorial Mount features precision motors and gears for accurate long-duration tracking. Dual stepper motors provide smooth and virtually vibration-free tracking that run at up to 250 pps. Its full-circle brass wheel gear allows the mount to track over extremely long periods with little error. The RA and DEC motors are situated inside the mount to reduce interference, and act as counterbalance for smaller scopes, eliminating the need for the counterweights and shaft. When not in use, the counterweight shaft retracts into the mount and out of the way. The Sphinx comes with the Star Book One (SB1) hand controller to help find, observe, and track celestial objects. Since near and deep sky objects appear to move at different speeds, the SB1 features celestial, solar, lunar, and King's rate tracking speeds. An integrated autoguider port adds to the mount's usability.

The provided tripod on which to rest the telescope, mount, and hand controller is Vixen's HAL 130 tripod. Its adjustable height allows the user to set the position of the telescope to their liking for easy and comfortable viewing. The top of the tripod is powder-coated with a durable finish that resists chipping, flaking, and fading. The tripod is collapsible for convenient storage and portability.

Also included in this bundle is Vixen's Red Dot Finder to aid in centering observed objects, a compression ring that allows the use of 2.0" eyepieces, and a half pillar which contributes approximately 8.0" of additional height to the mount. This provides clearance when attaching a DSLR to the rear or the telescope, and increases comfort for taller observers as well.

Telescope
  • Apochromatic Refractor with "Super Low Dispersion" glass
  • 81mm aperture
  • 625mm focal length
  • f/7.7 focal ratio
  • Muti-coated glass for clear, high contrast viewing, and elimination of false color
  • Stable, yet light weight at 5.1 lb
  • Dual Speed Focuser with quick, and fine 1/7th speed focusing
Mount
  • Motorized equatorial mount with hand controller
  • 27 lb payload capacity, excluding counterweights
  • Precise azimuth adjustment indicators
  • Integrated counterweight shaft retracts into mount when not in use
  • Includes one 4.2 lb counterweight
  • Vixen-style dovetail saddle
Gears and Motors
  • Two stepping (pulse) motors at 250 pulses per second
  • 180-tooth full circle micro-movement wheel gear
  • 40mm aluminum-alloy die-cast Right Ascension axis
  • 35mm aluminum-alloy Declination axis
  • ±7° azimuth adjustment, twin tangent screws/knobs with about 1.2°/rotation
  • 0-70° altitude adjustment, 3-altitude zone settings, 2° increment altitude scale, twin T-bar handles with 0.8°/rotation
Star Book One
  • Powered by mount through connector port
  • LED display screen backlight
  • Red backlit keypad
  • Independent screen and keypad dimming control
  • ST-4 compatible integrated autoguider port
  • Sidereal tracking with different tracking speeds: Celestial, solar, lunar, and King's rate
  • Variable manual slewing speeds from 0.1x to 999x
  • Backlash compensation
  • Periodic error correction (PEC) removes inaccuracies inherent in gears and allows for more accurate tracking, especially for long-exposure astrophotography
  • Adjustable screen brightness
  • Selectable tracking for Northern and Southern hemisphere
HAL 130 Tripod
  • Lightweight aluminum
  • White powder-coated head
  • Variable height from 25 to 39"
  • Maximum leg spread of 63.5" diameter
  • Folded length of 32"
  • 77 lb payload capacity
  • Weighs 12.1 lb
Optical Design Refractor
Aperture 81 mm
Focal Length 625 mm
Focal Ratio f/7.7
Eyepiece Barrel Diameter 1.25"
Diagonal Flip mirror
Finder Red dot sight
Tripod 2-stage, adjustable-height
Mount Type German equatorial
Power Source 12 VDC
Optical Tube Dimensions 23.0 x 3.5" (58.5 x 9.0 cm)
Weight Optical Tube: 5.1 lb (2.3 kg)
Mount: 15.5 lb (7.0 kg), excluding counterweights
Tripod: 12.1 lb (5.5 kg)

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