TS Optics Cassegrain 154 OTA

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.

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.

TS-Optics manufacturer documentation

Compatibility notes

Classical Cassegrain, not Ritchey–Chrétien or Schmidt-Cassegrain. Manufacturer’s aperture-specific reflectivity and linear-obstruction values retained.

Additional specifications