TS-Optics RC 203 Pro Carbon OTA This 203 mm Ritchey–Chrétien uses hyperbolic primary and secondary mirrors with 1624 mm focal length at f/8. The all-reflective optical layout is intended for imaging and can also be used visually with suitable accessories.
Manufacturer model: TS-Optics RC 203 Pro Carbon OTA · Specifications checked against manufacturer data on 2026-11-04
This 203 mm Ritchey–Chrétien uses hyperbolic primary and secondary mirrors with 1624 mm focal length at f/8. The all-reflective optical layout is intended for imaging and can also be used visually with suitable accessories.
Focusing and spacing
A separate focuser moves the eyepiece or camera without focusing by shifting the primary mirror. The table labels backfocus from the focuser socket separately from any distance measured from the rear tube surface.
Tube and mounting
This is the carbon fibre-tube configuration. Its published weight, secondary obstruction and mounting rails remain specific to this version; carbon and metal RC assemblies are not interchangeable specifications.
Manufacturer details
Carbon 8-inch RC with GP and Losmandy rails; not the 8.25 kg metal-tube version. Backfocus reference surfaces remain explicit.
Compatibility notes
Carbon 8-inch RC with GP and Losmandy rails; not the 8.25 kg metal-tube version. Backfocus reference surfaces remain explicit.
Additional specifications
Secondary obstruction
85 mm
Connection thread
M90 × 1
Dovetail bars
One GP and one Losmandy-style; each 395 mm
20901
Data sheet
Aperture
203 mm / 8 inches
Backfocus
254 mm from tube rear; 159 mm from focuser 2-inch socket
TS-Optics RC 203 Pro Carbon OTA This 203 mm Ritchey–Chrétien uses hyperbolic primary and secondary mirrors with 1624 mm focal length at f/8. The all-reflective optical layout is intended for imaging and can also be used visually with suitable accessories.
Manufacturer model: TS-Optics RC 203 Pro Carbon OTA · Specifications checked against manufacturer data on 2026-11-04
