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TS-Optics 20 inch f/8 Ritchey-Chrétien Astrograph - carbon truss tube

The TS 20" f/8 Ritchey-Chrétien astrograph is a ultimate telescope for astrophotography. The scope is perfect for bigger observatories.

The TS 20" f/8 Ritchey-Chrétien Truss Tube Astrograph is a true RC telescope and will give you spectacular photo results also with large format camera sensors.

The telescope is perfect for big observatories and will be carried from mounts 10Micron GM4000 Class.

Aperture 20" / 508 mm

Focal Length 4064 mm

Focal Ratio f/8

Carbon truss tube with 2 Losmandy level dovetail bars

99% dielectric high-reflectivy coating on main and secondary mirror for an even brighter image

Big corrected flat field without need for additional correctors

3" MONORAIL Focuser with better stability

Redesigned back plate, decoupling of the focuser from the telescope with seperate collimation.

SPECIAL OFFER: CCD47 - 0.67x focal reducer for photography - at an absolutely special price if purchased directly from TS at the same time - item number CCD47-S

Images on the left side are from the 16" RC Astrograph. The features of the 20" are identical.

Manufacturer: -TS Teleskope

Product number: GSRC20Truss

EUR 14.990,00

incl. 19 % VAT (DE)

The VAT indicated refers to that applicable in Germany. After logging in, the VAT amount is adjusted to the applicable VAT of the stored delivery country. Therefore, the final price may vary accordingly.

excl. 65.45 € shipping costs (DE)

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TS-Optics 20 inch f/8 Ritchey-Chrétien Astrograph - carbon truss tube

The TS 20" f/8 Ritchey-Chrétien astrograph is a ultimate telescope for astrophotography. The scope is perfect for bigger observatories.

The TS 20" f/8 Ritchey-Chrétien Truss Tube Astrograph is a true RC telescope and will give you spectacular photo results also with large format camera sensors.

The telescope is perfect for big observatories and will be carried from mounts 10Micron GM4000 Class.

Aperture 20" / 508 mm

Focal Length 4064 mm

Focal Ratio f/8

Carbon truss tube with 2 Losmandy level dovetail bars

99% dielectric high-reflectivy coating on main and secondary mirror for an even brighter image

Big corrected flat field without need for additional correctors

3" MONORAIL Focuser with better stability

Redesigned back plate, decoupling of the focuser from the telescope with seperate collimation.

SPECIAL OFFER: CCD47 - 0.67x focal reducer for photography - at an absolutely special price if purchased directly from TS at the same time - item number CCD47-S

Images on the left side are from the 16" RC Astrograph. The features of the 20" are identical.

Details..
Technical data..
In the box..

Detailed description will be available soon.

Instruction video

Teleskop-Service has created an instruction video about collimating an RC telescope:

Optical Design:	True RC with a hyperbolic primary and secondary mirror.
Aperture:	20" / 508 mm
Focal Length:	4064 mm
Focal Ratio:	f/8
Mirror material:	low thermal expansion quartz primary and secondary mirrors
Reflectivity:	99% reflectivity non-tarnishing dielectric mirror coatings
Connection at focuser:	2", 1.25" and M69x1 thread (female)
Back Focus:	233 mm from the M117 thread on the tube backside - 127 mm from 2" connection of the focuser
Tube:	Carbon Truss Tube with 2x dovetails - Losmandy style

20" f/8 RC Astrograph

3" Focuser with 1:10 Micro Transmission

Reduction to 2" and to 1.25"

2x Dovetails - Losmandy style

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