TS-Optics 154 mm f/12 classical Cassegrain This 154 mm classical Cassegrain combines a parabolic primary and hyperbolic secondary to give a 1848 mm focal length at f/12. The all-reflective optical train is suited to high-magnification observing and lunar/planetary imaging.
Manufacturer model: TS-Optics 154 mm f/12 classical Cassegrain · Specifications checked against manufacturer data on 2026-11-04
This 154 mm classical Cassegrain combines a parabolic primary and hyperbolic secondary to give a 1848 mm focal length at f/12. The all-reflective optical train is suited to high-magnification observing and lunar/planetary imaging.
Focusing and backfocus
A separate 2-inch dual-speed Crayford focuser adjusts the camera or eyepiece. The manufacturer specifies roughly 150 mm backfocus from the 2-inch socket and an M90 × 1 focuser connection on the tube.
Model-specific construction
The 154 mm version’s table provides its own reflectivity, secondary obstruction, tube dimensions, mass and dovetail arrangement. These values are not borrowed from the other aperture. Suitable adapters and optical extensions depend on the eyepiece or camera train.
Classical Cassegrain, not Ritchey–Chrétien or Schmidt-Cassegrain. Manufacturer’s aperture-specific reflectivity and linear-obstruction values retained.
Additional specifications
F ratio
f/12
Suitable for infrared photography
yes
Backfokus
roughly 150 mm from the 2" receptacle
Secondary mirror obstruction
38% (linear)
Connection thread of the focuser
M90x1 on the tube
60781
Datasheet
Opening
154 mm - 6"
Zwaluwstaart
Vixen-GP (Skywatcher-EQ5) style
Brandpuntsafstand
1848 mm
Focuser
2" Crayford focuser with speed reduction
Artikelnummer fabrikant
TSCas6M
Model
TS-Optics 154 mm f/12 classical Cassegrain
Optiek
Cassegrain optics with parabolic primary and hyperbolic secondary mirror
Reflectiviteit
96% to primary and secondary mirror
Tubusdiameter
191 mm
Tubuslengte
roughly 500 mm
Gewicht
5.4 kg
Specifieke referenties
MPN
TSCas6M
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TS-Optics 154 mm f/12 classical Cassegrain This 154 mm classical Cassegrain combines a parabolic primary and hyperbolic secondary to give a 1848 mm focal length at f/12. The all-reflective optical train is suited to high-magnification observing and lunar/planetary imaging.
Manufacturer model: TS-Optics 154 mm f/12 classical Cassegrain · Specifications checked against manufacturer data on 2026-11-04
