24 inch Ritchey-Chrétien Optical Tube Assembly

Part#: 240125

Price: $65,000.00

Introducing the PlaneWave Instruments PW24-RC, a 24 inch (0.61 m) f/6.5 Ritchey-Chrétien (RC) Astrograph telescope. The PW24-RC has a dual truss design, with 3 cooling fans for the back of the primary mirror and 4 fans for the front surface of the primary mirror. The instrument weight is 240 lbs (109 kg) and comes standard with a back plate retaining ring ready to accept the focuser of your choice.

Also available with the CDK (Corrected Dall-Kirkham) optical design
   New Fused Silica mirror option available on all  CDK and RC models     240125Q - PW24-RC Fused Silica - $75,000

 

Introducing the PlaneWave Instruments PW24-RC, a 24 inch (0.61 m) telescope with Ritchey-Chrétien optics. PlaneWave's CDK astrographs have become the telescopes of choice for universities, industry, and astrophotographers around the world, and now PlaneWave offers the PW-RC series to meet the custom needs of the scientific community.

The PW24-RC 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.

 

 

 

Features:

Ritchey-Chrétien (RC) Optics RC optics made by PlaneWave for excellent on-axis performance using only a hyperbolic primary and secondary mirror with no refractive optics in the light path. (An optional field correcting lens group can be added to improve off-axis performance.)  
Carbon Fiber Truss Design Minimizes thermal expansion to prevent focus shift with changes in temperature
Dovetail expansion joint Accommodates the difference in thermal expansion between carbon fiber and aluminum. The expansion joint allows the aluminum dovetail to expand and contract without stressing the carbon fiber lower truss  
Cooling Fans Three cooling fan blow out the back of the optical tube, pulling air though the telescope and past the primary mirror. This helps the telescope to reach thermal equilibrium quickly. The fans are controlled by a computer if the optional Electronic Focus Accessory (EFA Kit) is purchased.  

OPTICAL SYSTEM

Optical Design Ritchey-Chrétien (RC)
Aperture 24 inch (610 mm)
Focal Length 3962 mm (155.98 inch)
Focal ratio F/6.5
Central Obstruction 47% of the Primary Mirror Diameter
Back Focus from Mounting Surface 14.1 inch (358 mm)
Back Focus from Racked in Focuser 5.81 inch (148 mm)
Weight 240 lbs (108.9 kg)
OTA Length 56 inch (1,422 mm)
Upper Cage Carbon Fiber Truss
Lower Cage Carbon Fiber Truss with Aluminum Light Shroud
OTA Width 31 inch (787 mm)
OTA Height 35 inch (889 mm)

SECONDARY MIRROR

Diameter 9.45 inch (240 mm)
Material Precision Annealed Borosilicate
Shape Hyperbolic
Coating Enhanced Aluminum - 96%

PRIMARY MIRROR

Optical Diameter 24 inch (610 mm)
Outer Diameter 24.5 inch (622 mm)
Shape Hyperbolic
Material Precision Annealed Borosilicate or Fused Silica
Coating Enhanced Aluminum - 96%


  SHIPPING
Crated Shipping Weight 500 lbs   (226.8 kg)
Crate Width 40 inch   (1,016 mm)
Crate Height 48 inch   (1,219 mm)
Crate Length 78 inch   (1,981 mm)
  INCLUDED ACCESSORIES
CDK24 Focus Spacer (240343) This 5.3" long spacer may be installed between the backplate and the focuser to take up some of the CDK24's extra backfocus and reduce the torque placed on the focuser mechanism. This spacer is sized such that the backfocus distance behind the focuser will match that of the CDK20.
Ronchi Spacer (200354) This spacer sits in place of a focuser and is used for setting the primary to secondary spacing. It has an 1-1/4 inner diameter and may be used with 1-1/4 oculars for collimation.
Ronchi Ocular This ocular is a Ronchi screen used for setting the primary to secondary spacing.
Primary Mirror Cover The Primary Mirror Cover protects the primary mirror.
Planewave thumb drive Includes instructions for Collimation and Spacing and software.
12VDC Power Supply Provides power for the fans (Not included for European Orders)
Wrench Set (5812A35) English Hex Wrenches (European Orders Only)
   
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