TS Optics Newtonian Collimation Cap 1.25-inch

TS-Optics TSJK 1.25-inch collimation cap

The TSJK is a simple plastic cap with a central viewing opening for checking telescope optical alignment.

Fit and alignment

It fits a 1.25-inch focuser socket and holds the viewing position near the optical axis. Use the telescope’s collimation adjustments to bring the relevant mirror references into alignment.

Tool type

It is a passive visual centring aid, rather than a laser or an artificial-star projector. It contains no active electronics.

TS-Optics manufacturer documentation

Compatibility notes

Exact named TS manufacturer model and its published technical table checked. Unpublished dimensions, capacities and package items are not inferred.

Additional specifications