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Designed to handle larger optical tube assemblies and heavy imaging rigs, Vixen's Sphinx SXD2 Equatorial Mount provides a precise and stable motorized mount for long observation sessions, or long-exposure astrophotography. Dual stepper motors provide smooth and virtually vibration-free tracking that run at up to 250pps. Its full-circle brass wheel gear allows the mount to track over extremely long periods with little tracking error.
The Sphinx comes with the Star Book One (SB1) computer, which helps you 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 Polaris guide scale, for use in the Northern hemisphere, is accurate through the year 2025. An Octant 4-star pattern is also set on the reticle for use in the Southern hemisphere.
The Sphinx is offered here without an optical tube assembly, tripod, or pier.
Motorized and computer-guided equatorial mount
33 lb payload capacity, excluding counterweights
Precise azimuth adjustment indicators
Vixen-style dovetail saddle
Built-in polar alignment scope
Gears and Motors
Two stepping (pulse) motors at 250 pulses per second
72mm diameter, 180-tooth full circle micro-movement brass wheel gear
35mm carbon steel Right Ascension axis
40mm carbon steel Declination axis
±7° azimuth adjustment, twin tangent screws/knobs with about 1.2°/rotation
0-70° altitude adjustment, 3-altitude zone settings ±15° per zone, 2° increment altitude scale, twin T-bar handles with 0.8°/rotation
Polar Alignment Scope
Built-in 6x20 scope
Field of view: 8°
Integrated bubble level
Setting accuracy within 3 arc minutes
Time graduation circle: 10 arc minutes increments between 16h and 8h (the following day)
Date graduation circle: 2-day increments
Meridian offset circle: Adjustable between 20° East and 20° West, in 5-degree increments
Northern hemisphere: Polaris guide scale, applicable to the year 2025
Southern hemisphere: Octant 4 stars pattern
Counterweights and Bar
Retractable 20mm counterweight bar
1 x 8.15 lb counterweight
1 x 4.2 lb counterweight
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
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
In the Box
Vixen Optics Sphinx SXD2 Equatorial Mount with Star Book One
Star Book One Hand Controller
STAR BOOK Cable
Strap for STAR BOOK One with Battery
Counterweights 3.7kg and 1.9kg
Ferrite Core for LAN cable
Phillips Head Screwdriver
Cigarette-Lighter Plug Cord
Limited 5-Year Warranty
Table of Contents
33 lb (15 kg)
RA: 72mm diameter, 180-tooth full circle micro-movement gear, Brass wheel Dec: 72mm diameter, 180-tooth full circle micro-movement gear, Brass wheel
9 mm diameter, Brass
Right Ascension Axis
35 mm in diameter, Carbon steel
40 mm in diameter, Carbon steel
2 x Stepping (pulse) motors with 250 PPS
Yes, with included Star Book Ten controller
Altitude / Azimuth Adjustment
Alt: 0 to 70° Az: ±7°
Polar Axis Scope
Built-in 6 x 20 scope Field of View: 8° Bubble level Illuminated reticle
1 x 8.2 lb (3.7 kg) 1 x 4.2 lb (1.9 kg)
12 VDC Consumption: 0.45 to 2.2 A (with a 10 kg payload), 0.6 to 2.5 A (with a 15 kg payload)
13.5 x 14.2 x 5.0" (34.3 x 36.0 x 12.8 cm)
20.3 lb (9.2 kg), excluding counterweights
Vixen Optics Sphinx SXD2 Equatorial Mount with Star Book One Review