PlaneWave RC500 Telescope System f/6.8

More Views

Application Images

Images uploaded by Customers

No customer Image uploads yet. Add Your Review with Images
PlaneWave RC500 Telescope System f/6.8

# 1323251Q

Price: please inquire

  • PlaneWave RC500 Telescope System f/6.8 with Fused Silica Optics
  • incl. a RC 20 Astrograph and L-500 Mount
    • RC 20 Astrograph, 20 inch, modified to Ritchey-Chrétien, uses only a primary and secondary mirror with reflective coatings
    • 8" Dovetail, focal length 3.454 mm (f/6,8)
    • Delta T Ready, 3,5" Hedrick Focuser and EFA Kit separately available

    • L-500 can hold payload of over 200 lbs for CDK17
    • Zero Backlash, Zero Periodic Error
    • Incredible slew speed up to 50 degrees per second
    • With integrated high resolution encoders
    • Through the mount cabling
Important note: This product is not available online. Price on application. If you are interested, please send us a formal inquiry incl. contact data by email. We shall gladly provide a detailed offer.

Product Questions

No questions yet. Be the first to ask a question about this product - it will be answered by other customers or an Admin.


PlaneWave RC500 Telescope System f/6.8

Based on the technology of our PW-1000 (1-meter) Observatory telescope, PlaneWave combines its revolutionary optical systems with its brand new innovative L-Series direct drive mount that sets a new standard for small observatory telescopes.

PlaneWave RC500 Telescope System f/6.8 consits of the RC20 and the L-500 Direct Drive Mount with integrated high resolution encoders and high speed slewing.

The PlaneWave Instruments RC 20 is a 20 inch (0.51 m) f/6.8 Ritchey-Chrétien (RC) Astrograph telescope. The instrument weight is 140 lbs (64 kg) and comes standard with a back plate retaining ring ready to accept the focuser of your choice.

The RC20 in its native format (no field flattening lenses) uses only a primary and secondary mirror with reflective coatings. This can be useful when making observations primarily on-axis and wide field imaging is not a concern.

Fused Silicia is a synthetic amorphous silica glass of the highest purity and one of the most transparent glasses made. The optical and thermal properties of fused silica are superior to other types of glass due to its purity. Its transmission and homogeneity exceed those of crystalline quartz without the problems of temperature instability inherent in the crystalline form. Fused Silica has a coefficient of thermal expansion six times lower than Borosilicate (Pyrex) glass, which means that as fused silica cools down, it preserves its shape to a high degree of accuracy. This translates into consistent optical performance and unchanging focus over temperature changes. With its high melting temperature ()~ 1.600 degree Celsius), a very low coefficient of thermal expansion and resistance to thermal shock, fused silica is the material of choice for professional observatories as well as various scientific applications.

The L-Series combines versatility, simplicity and affordability by combining all the technology of our Observatory class telescopes into a compact stand-alone mount.

The mount is equipped with direct drives motors as well as high-resolution encorders. The software is ASCOM compatible and the direct drive motors can move the telescope at incredible speeds for tracking satellites.

In its Alt/Az configuration it is considerably more compact than its equatorial counterpart, allowing a larger telescope to fit in a smaller enclosure. The mass it takes to make a rigid alt/az mount is substantially less, leading to cost savings. Unlike German Equatorial mounts, there are no meridian flips to deal with, and no  large protruding counterweights to create a dangerous hazard in a public observatory. Alt/Az is more intuitive to use and no polar alignment is needed.

L-Serie Features:

L-500 Direct Drive Mount
Planewave L-Series Direct Drive Mount wire cabeling
  • Direct-drive motors on each axis for smooth, fast, and virtually silent movement of the telescope
  • Slew speeds up to 50 degrees per second
  • High resolution encoders on each axis for precise positioning
  • Zero backlash, Zero periodic error
  • Latitude Range:  0 to 90 degrees, Northern and Southern hemispheres
  • Enclosed electronics
  • Through the mount cabling: Access panels in the fork arm and azimuth axis allow for camera equipment cabling through the inside of the mount.
  • Dual mounting bracket: PlaneWave style mounting bracket to hold CDK17/20 onto inside of fork arm with additional option of mounting a scope on the outside of the fork arm. Optional dovetail clamp required.
  • Azimuth dovetail balance system: For precise center of gravity balance whether in Alt-Az or Equatorial configuration

Control System

  • User Interface: PlaneWave Interface 4 (PWI4) Control Software with integrated PointXP mount modeling software
  • Slew Rate: 20 degrees per second (standard); 50 degrees per second (maximum), both axes
  • Home position sensors are included allowing the mount can find its home position on power up.
Related Articles

Additional Information

Manufacturer Planewave
SKU (#) 1323251Q
Optical Design Ritchey-Chrétien (RC)
Aperture (mm) 20" (508 mm)
Focal Length 3.454 mm (135.98 inch)
Focal Ratio f/6.8
Image Field 52 mm
Back Focus Distance 5.8" (147 mm) from Racked in Focuser
Central Obstruction 39% of the Primary Mirror Diameter
Substrate Fused Silica
Optical Tube Weight 140 lbs (64 kg)
Mount Equatorial & Alt-Az Single-Arm mount
Payload Capacity (kg) 200 lbs (91 kg)
Mount Type Alt-Az or Equatorial configuration
Mount Weight 100 kg
Latitude Range 0 to 90 degrees, Northern and Southern hemisphere
Slew Speeds 20 degrees per second (standard); 50 degrees per second (maximum), both axes
Tracking Accuracy < .3 arcsecond error over 5 minute period
All-sky pointing accuracy <10 arcsecond RMS with PointXP Model
Pointing Precision 2 arcsecond
System Natural Frequency 10 Hz or greater
Software PlaneWave Interface (PWI4). Incorporates PointXP mount modeling software by Dave Rowe All ASCOM compatible
Homing Sensors Home position sensors are included allowing the mount can find its home position on power up
Motor Torque Approximately 20 ft-lbs continuous; 50 ft-lbs peak
Motor Azimuth and Altitude: Direct Drive 3 Phase Axial-Flux Torque Motors
Control system electronics PlaneWave Interface dual axis telescope control
Encoder 152mm disk built into the azimuth and altitude axes with stainless steel encoder on the circumference with reader yields 18,880,000 counts per revolution of the telescope. This translates to about 0.069 arcsecond resolution
Motor Control Industrial grade brushless motor control system and built in electronics
Power Requirements Accepts 120 VAC. Supplied with 12VDC 15A Regulated Power Adapter

You may also be interested in the following product(s)

Tell us what you think about this item!

Write A Review
    Please, wait...