TS-Optics 154/1370 mm f/9 Ritchey–Chrétien This 154 mm Ritchey–Chrétien uses hyperbolic primary and secondary mirrors with 1370 mm focal length at f/9. The all-reflective optical layout is intended for imaging and can also be used visually with suitable accessories.
Manufacturer model: TS-Optics 154/1370 mm f/9 Ritchey–Chrétien · Specifications checked against manufacturer data on 2026-11-04
This 154 mm Ritchey–Chrétien uses hyperbolic primary and secondary mirrors with 1370 mm focal length at f/9. 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 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
The manufacturer specifies a 154 mm aperture and 1370 mm focal length for this nominal 6-inch RC.
Additional specifications
Obstruction by secondary
77 mm
Connecting thread
M90x1
Dovetail bar
1x GP style
20900
Data sheet
Aperture
6" / 154 mm
Back focus
159 mm from 2" connection of the focuser
Focal length
1370 mm
Focal ratio
f/9
Focuser
2" dual speed Crayford focuser
Manufacturer listed equipment
6" f/9 RC astrograph 2" Crayford focuser with 1.25" adaptor Vixen style dovetail bar M90 Extension rings 1x 50 mm and 2x 25 mm Dust cover
Manufacturer part number
TSRC6M
Model
TS-Optics 154/1370 mm f/9 Ritchey–Chrétien
Optical design
True RC with a hyperbolic primary and secondary mirror.
Reflectivity
94% reflectivity non-tarnishing mirror coatings
Resolution
0.76"
Tube diameter
191 mm
Tube length
500 mm with focuser
Tube weight
5.4 kg
Specific References
MPN
TSRC6M
Used this product? Share your experience with other astronomers.
Comments (0)
No customer reviews for the moment.
Your review appreciation cannot be sent
Report comment
Are you sure that you want to report this comment?
Report sent
Your report has been submitted and will be considered by a moderator.
Your report cannot be sent
Write your review
Review sent
Your comment has been submitted and will be available once approved by a moderator.
TS-Optics 154/1370 mm f/9 Ritchey–Chrétien This 154 mm Ritchey–Chrétien uses hyperbolic primary and secondary mirrors with 1370 mm focal length at f/9. The all-reflective optical layout is intended for imaging and can also be used visually with suitable accessories.
Manufacturer model: TS-Optics 154/1370 mm f/9 Ritchey–Chrétien · Specifications checked against manufacturer data on 2026-11-04
