Mugast 1.25 Inch Calibration Eyepiece, Astronomical Telescope Optical Eyepiece Suitable for Refraction Telescope

Description

The 1.25 inch calibration eyepiece is small in size, made of aluminum alloy and CNC finished. Used to calibrate the optical axis of a refractor, insert the collision eyepiece in the tube. Make sure the black dot is in the center of 2 lines of collimation eyepiece. Please adjust the screws if they are not at the middle, in this way they will stick together successfully. A wonderful accessory for lovers of photography and astronomy.