Planewave Europe

PlaneWave CDK400 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 CDK400 Telescope System f/6.8 consits of the CDK17 and the L-500 Direct Drive Mount with integrated high resolution encoders and high speed slewing.

The PlaneWave Instruments CDK17 is a 17 inch (0.43 m) f/6.8 Corrected Dall-Kirkham Astrograph telescope. The CDK17 covers a 70 mm field of view without any field curvature, off-axis coma, or astigmatism. The instrument weight is 94 lbs (43 kg) and comes standard with a back plate retaining ring ready to accept the focuser of your choice.

The abbreviation CDK stands for the optical system of the PlaneWave astrographs - a Dall Kirkham Cassegrain with a optical correction unit. More about the Optical Design (CDK).

PlaneWave CDK400 Telescope System f/6.8 with Fused Silica Optics

incl. a CDK17 Astrograph and L-500 Mount

CDK17 Astrograph, 17 inch, modified to Dall-Kirkham, with fully corrected image field
8" Dovetail, focal length 2.939 mm (f/8)
Delta T Ready, 3,5" Hedrick Focuser and EFA Kit separately available
Requires a crating #1323517. The crating will be charged extra
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
Requires a crating #1323505. The crating will be charged extra

Specifications

Optical Design

Corrected Dall-Kirkham (CDK)

Aperture (mm)

17" (432 mm)

Focal Length

2.939 mm (115.71 inch)

Focal Ratio

f/6.8

Image Field

70 mm

Back Focus Distance

10.24" (260 mm) from Mounting Surface, 7.24" (184 mm) from Racked in Focuser

Central Obstruction

23.7 % by surface area, 49% of the Primary Mirror Diameter

Substrate

Fused Silica

Optical Tube Weight

106 lbs (48 kg)

Mount

Alt-Az or Equatorial configuration

Payload Capacity (kg)

200 lbs (91 kg)

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

Pointing Precision

2 arcsecond

All-sky pointing accuracy

<10 arcsecond RMS with PointXP Model

System Natural Frequency

10 Hz or greater

Control system electronics

PlaneWave Interface dual axis telescope control

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

Motor Control

Industrial grade brushless motor control system and built in electronics

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

Power Requirements

Accepts 120 VAC. Supplied with 12VDC 15A Regulated Power Adapter

Control system electronics

PlaneWave Interface dual axis telescope control

Manufacturer

Planewave

SKU

1323240Q