PlaneWave .7 Meter Telescope With Fused Silica Optics

  • 0.7 meter Planewave Ritchey-Cretien telescope
  • Dual Nasmyth focus
  • Direct drive motors on each axis
  • Hi-Res Encoders on each axis
  • Zero backlash
  • Zero periodic error
  • PointXP Mount Modeling Software
  • Field de-rotator / field framing
  • Stiff, smooth, quiet and extremely fast drive system

    Customer Note: Because the PlaneWave Instruments 0.7mTelescope System is specialized equipment, the price quoted here does not include freight costs. Please call 1.800.483.6287 during business hours for the exact shipping cost to your area. Thank you! 

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    • Regular price $210,000.00

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    PlaneWave .7 Meter Telescope With Fused Silica Optics

    An alt/az mount is inherently more stable than an equatorial mount as there is no cantilevered mass, nor are there any large counterweight protruding that is very dangerous in a public observatory. The mass required to make a rigid Alt/Az mount substantially leads to cost savings. There is no dealing with balance changes as you cross the meridian or meridian flips that German Equatorial Mounts have to deal with. You can image from horizon to horizon continuously if desired. Alt/Az is more intuitive to use and there is no polar alignment needed.

    Benefits of Nasmyth Focus:

    The Nasmyth Focus is along the altitude axis so there is virtually no balancing issue as you change out equipment. In addition, the RC700 comes standard with a field rotator/field framer.


    Direct Drive Motors and Encoders:

    Direct Drive motors mean that there are no gears which cause backlash and periodic error. With the high-resolution encoders providing the feedback for the direct drive motors, not only will the telescope track without periodic error or have any backlash at all, but the mount will be able to counter against wind gusts. The direct drive motors can move the telescope at incredible speeds for tracking satellites or just to minimize target acquisition time.



    Optical Design Ritchey-Chrétien
    Aperture 700 mm (27.56 inches)
    Focal Length 4540 mm
    Focal ratio 6.5
    Central Obstruction 47% of the Primary Mirror Diameter
    Back Focus 309 mm (12.2 inches) from Mounting Surface
    Weight 1,200 lbs
    Optical Tube Dual truss structure with Nasmyth focus
    Dimensions 93.73" H x 43.25" W x 39" D
    Focus Position Nasmyth Focus
    Mechanical Structure
    Fork Assembly Single piece U shaped fork arm assembly for maximum stiffness
    Azimuth Bearing 20-inch diameter thrust bearing
    Altitude Bearing 2 x 8.5 inch OD ball bearings
    Optical Tube Dual truss structure with Nasmyth focus

    Motion Control
    Motor Control Sideral Technology 3 phase 24 V AC brushless motor controller. Telescope mount modeling software included optimal pointing and tracking accuracy.
    Azimuth Motor Direct Drive 3 Phase Axial-Flux Torque Motor
    Altitude Motor Direct Drive 3 Phase Axial-Flux Torque Motor
    Encoder - Azimuth and Altitude 10-inch disk built into the azimuth and altitude axes with stainless steel encoder tape on the circumference with reader yields 16 million counts per revolution of the telescope. This translates to about 0.08-arcsecond resolution.
    Motor Torque Approximately 35 ft-lbs
    Drive Electronics Capable of controlling up to 4 high-speed encoders, limit switch inputs, homing switch inputs, controls two additional motors for accessories, two brake outputs and 16 digital and 2 analog inputs
    SiTech Telescope Control Software Incorporates PointXP mount modeling software by Dave Rowe and SiTech's control software. All ASCOM compatible.

    Standard Features
    Point XP Modeling Software Telescope mount modeling software included for optimal pointing and tracking accuracy.
    SiTech Control Electronics Controls the motion of the telescope, the field de-rotator, and the focuser
    Focuser Large aperture, heavy-duty focuser can handle large payloads and will not add vignetting. The focuser is motor controlled and is ASCOM compatible
    Field De-Rotator / Image Framer Built-in field de-rotator and image framer
    Cooling Fans and Temp Sensors Multiple cooling fans and multiple temperature sensors for monitoring and equilibrating the primary mirror

    System Performance
    Pointing Accuracy 10 arcsecond RMS with PointXP Model
    Pointing Precision 2 arcsecond
    Tracking Accuracy 1-arcsecond error over a 3 minute period
    System Natural Frequency 10 Hz or greater
    Field De-Rotator Accuracy 3 microns of peak to peak error at 35mm off-axis over 1 hour of tracking (18 arcseconds)

    NOTE: All specifications and dimensions are subject to change. And we do expect small changes in many of the specifications.


    Aperture700 mm (27.5")
    Case IncludedNo
    Exterior ColorMatte Black
    Focal Ratiof/6.6
    Highest Useful MagnificationNot supplied by manufacturer
    Limiting Stellar Magnitude16
    Mount Type Motorized
    Optical CoatingsCoated
    Optical DesignRitchey Chretien
    OTA LengthNot supplied by manufacturer
    OTA Mount TypeDual Fork Arms
    OTA Outer DiameterNot supplied by manufacturer
    OTA WeightNot supplied by manufacturer
    Power Adapter IncludedAC Wall Adapter
    Warranty2 Year Warranty