Okular SMC XW 20mm 1,25"

This is the angle of aperture of an eyepiece.

Specifies the product's connection or connection thread on the telescope connection end. The same adapter dimension must always be available on the telescope.

A standard measurement for accessories, expressed as 1.25 inches. 1.25" is equal to 31.8 millimetres.

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

The remaining amount of light that reaches the eye.

Eyepieces with an apparent field of view of between 60° and 70°.