1.25", 35mm eudiascopic eyepiece

The smaller the focal length of an eyepiece, the higher the magnification when used with a telescope.

The optical elements are treated with ultra-thin coatings. Among others, there are anti-reflective coatings for reducing, and dielectric coatings for increasing reflection.

Inexpensive standard eyepieces, which are also included in the scope of supply of many telescopes.