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Knaeble Engineering Pro Line 320mm Ritchey-Chrétien
Knaeble Engineering Pro Line 320mm Ritchey-Chrétien Weave/Design

Knaeble Engineering Pro Line 320mm Ritchey-Chrétien

Product Number: KE-RCM320FC/TI

Manufacturer: Knaeble Engineering
Contact us for accessories and additional details.
Pricing starts at 22040.00.   

Description

320 mm ultra Hi End Ritchey-Chrétien truss telescope. 

The truss frame is entirely built with mono directional high module carbon fiber tubes. The connection rings are fabricated with 6 mm high module carbon fiber plates cut with water-jet and further reinforced with 2 mm plates in the areas of maximum stress concentration. The truss joints can optionally crafted in grade 5 CNC titanium.

The primary mirror cell is a true technological jewel: 100% structural carbon fiber construction, 9 points computer optimized mechanical cushion, and zero thermal expansion. It is fully tiltable through 3 titanium bolts placed on the telescope's back plane. The cell's maximum deformations under the highest mechanical stress configuration (tube pointing at the zenith) are less than 0.03 mm. This value still improves with the optional Carbon/Titanium back plane.

With the secondary mirror assembly we created a mechanism of unmatched reliability, stability and lightness. The fully tiltable cell is fixed on a 20 mm rectified titanium bar, firmly held in position by a high precision axial linear ball bearing. The focus of the secondary mirror is easily adjustable through the titanium bolt placed on top of the mechanism.

The dovetails are engineered with a Knaeble proprietary hybrid Aluminium-Carbon fiber construction (optional Titanium/Carbon). This type of design minimizes torsion deformation and structural misalignment under every pointing orientation. In comparison with traditional CNC aluminium dovetails, the deformations are reduced by a factor 40.

The back plane on all standard models is made of a solid 10 mm thick, high module carbon fiber plate.  It can host up to a 3.5" focuser with ca. 10 kg of equipment attached. The second dovetail can easily carry ca. 6 kg of additional equipment (e.g. a refractor, various tracking devices, etc.) without provoking substantial deformations on the main structure. The optional Titanium/Carbon design (see photos) ensures an even higher strength.

Optics ..............................................................................f/8 Ritchey-Chrétien
Optical quality ...................................................................Strehl Ratio >95%
Opening ............................................................................316 mm
Focal length .......................................................................2.530 mm
Mirror substrate .................................................................Schott Suprax
Focal length primary mirror .................................................1.106 mm (f/3.5)
Diameter primary mirror .....................................................316 mm
Diameter secondary mirror .................................................140 mm
Diameter unvignetted field ..................................................40 mm
Focal extraction behind backplane .......................................ca. 225 mm
Mass (w/o focuser) .............................................................ca. 19 kg
Length (w/o focuser) ...........................................................942 mm

The connection ring between the OTA and the focuser is fully tiltable

The structure of the telescope and the cell of the primary mirror are crafted in High Module Carbon Fiber (HMCF). For maximum stability, the connection components of the truss construction as well as the collimation bolts are crafted in grade 5 titanium.

RC320 Spot Diagram
RC320 Matrix Spot Diagram


Included with scope of delivery:
- Telescope RC FC/Ti
- 1 Carbon/Aluminum “Torsion Box”
- Losmandy 3” dovetail rails
- Carbon Fiber Dust Cover
- Wooden Crate

The following options are available:
- Field flattener, 68mm doublet (made in Germany), broadband coated 400-900nm, M68x1 connection, 100mm back focus
- Reducer/corrector 0.74x, 68mm triplet (made in Germany), broadband coated 400-700mn, M68x1 connection, 93mm backfocus
- Telescope thermal control unit, controls all temperature sensors, primary mirror fans, secondary heating and focusing system;  Ascom compatible, Ethernet or USB connection
- Titanium/carbon backplate and titanium truss joints

NOTE ON SHIPPING COSTS - shipping costs are not included in the price listed and must be determined separately either before or after the purchase.

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