Economical collimation tool ensures that your reflector telescope's optics are in precise alignment.
Combination 5inch long sight tube and 1.25inch Cheshire eyepiece.
For aligning optics of Newtonian reflectors,
Peephole in top and crosshairs at bottom enable precise optical centering.
Compatible with 1.25inch telescope focusers or 2inch focusers with a step-down adapter for using 1.25inch accessories
Size: 4.2*4.2*15.2cm
Colour: Black
Material: aluminum alloy
Package Content: 1* Long Calibration Eyepiece
1* opp bag
1* box