Alstar Collimating Cheshire Eyepiece, 1.25 Inch Telescope Collimator Tool for Newtonian Reflector with 45 Degree Plate Ideal for Precise Optics Alignment, Long Version Without Laser
For aligning optics of Newtonian reflectors, Dobsonian reflectors, and Schmidt-Cassegrain Telescopes (SCTs).
Fits in 1.25" focusers and easy to use;simply cap the telescope, remove the diagonal, and place the eyepiece directly in the focuser.
This collimation eyepiece can be used for precisely collimating the Newtonian and Schmidt-Cassegrain reflector telescopes for better image quality.
Item was made by aluminum with crosshair at the bottom allow quick and precise centering of the optics.
Accurate collimation is essential for high power observing. Stars will become more like pin points of light, and Planetary / Lunar detail will be enhanced.