Solomark Collimation Eyepiece - 1.25Inch Cheshire Without Laser for Newtonian Telescopes and Reflectors - Metal, Long

Special eyepiece fits into 11/4" focusers or diagonals.

For aligning optics of Newtonian reflectors, Dobsonian reflectors, and Schmidt-Cassegrain Telescopes (SCTs)

Collimation eyepiece is more accurate than the simple Collimation Tool

When collimating a refractor you should put the Cheshire directly into the focuser.

With Dustproof and MoistProof Rubber Cover-Expert Design-CNC Machine Made- Precise Surface Dealing