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  • PlaneWave astrografo CDK12.5 f/8 con ottiche in silicio fuso PlaneWave astrografo CDK12.5 f/8 con ottiche in silicio fuso

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for order at least €250

PlaneWave RC20 f/6.8 Ritchey-Chrétien with fused silica optics

Product code: 1323221Q

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Quick Overview

The PlaneWave Instruments RC20 is a 20 inch (508mm) f/6.8 Ritchey-Chrétien (RC) telescope. The RC20 has a dual carbon-fiber truss design, with 3 cooling fans ejecting air from the back of the 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.


For optional accessories (Delta T controller, Hedrick focuser, EFA electronic focuser) and telescope availability and delivery time, please contact us.

Availability: Available

Order €56,590.00
22% tax incl

Details

PlaneWave Instruments is pleased to offer the RC20, a 20 inch (508mm) 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 RC series to meet the custom needs of the scientific community. 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.

PlaneWave RC20 f/6.8 Ritchey-Chrétien with fused silica optics

PlaneWave RC20 f/6.8 Ritchey-Chrétien with fused silica optics: main 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: open truss tube design with carbon fiber frame minimizes thermal expansion which causes focus shift with changes in temperature. Carbon fiber truss design also promotes quick thermal cooling and provides a rigid, lightweight structure.

Dovetail expansion joint: allows for the difference in thermal expansion between carbon fiber and aluminum. The expansion joint allows the aluminum dovetail expand and contract without stressing the carbon fiber lower truss

Cooling Fans: three fans blow out of the optical tube pulling air though the telescope and by the primary mirror. This helps the telescope to reach thermal equilibrium quickly. The fans are controlled by a switch on the optical tube or can be controlled by a computer if the optional Electronic Focus Accessory (EFA Kit) is purchased.

Technical specifications

Optical Design Ritchey-Chrétien
Optics Primario e secondario iperbolici
Diameter (mm) 508mm
Tube diameter N/A
Focal Length (mm) 3454mm
Focal Ratio 6.8
Field flattener/corrector Not included (optional)
Optical Tube Carbonio
Obstruction 39%
Focuser Opzionale
Eyepiece holder No
Weight 63,5 kg
Hard/soft case No

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