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TS-Optics RC 203 Pro 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.
Focusing and spacing A separate focuser moves the eyepiece or camera without focusing by shifting the primary mirror. Extension rings are used to accommodate different optical trains. The table labels backfocus from the focuser socket separately from any distance measured from the rear tube surface.
Tube and mounting This is the metal-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 Metal-tube 8-inch RC. 8.25 kg includes focuser, with an additional 500 g for extension tubes; carbon mass/rail configuration not substituted.
TS-Optics manufacturer documentation
Compatibility notes Metal-tube 8-inch RC. 8.25 kg includes focuser, with an additional 500 g for extension tubes; carbon mass/rail configuration not substituted.
Additional specifications Total obstruction by secondary 85 mm Connection thread M90x1 Dovetail bars 2x GP style, each with 395 mm length
Referentie
46250
Datasheet
Opening
203 mm / 8"
Backfocus
254 mm from the tube´s backside or 159 mm from the 2" receptacle of the focuser
Brandpuntsafstand
1624 mm
Openingsverhouding
f/8
Focuser
2" Monorail focuser
Door fabrikant genoemde apparatuur
8" f/8 RC Astrograph 2" Focuser with reduction from 2" to 1.25" 2x Dovetail - GP style M90 extension tubes for easy reaching of the focus
Artikelnummer fabrikant
TSRC8M
Model
TS-Optics RC 203 Pro OTA
Optisch ontwerp
True RC with a hyperbolic primary and secondary mirror.
Reflectiviteit
94% enhanced reflectivity
Resolutie
0.58"
Tubusdiameter
230 mm
Tubuslengte
580 mm with focuser
Gewicht
8.25 kg with focuser, plus 500 g for extension tubes
Specifieke referenties
MPN
TSRC8M
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TS-Optics RC 203 Pro 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 OTA · Specifications checked against manufacturer data on 2026-11-04