Alstar 1.25" 9mm 58-Degree Planetary Eyepiece for Telescope

Primarily made for planetary observation, these 1.25" fully multicoated eyepieces give maximum detail and definition across the entire 58 degree field of view.

A great value, these eyepieces are exceptional at nearly eliminating lateral color aberration and light scatter often associated with more expensive eyepieces that are better suited for deep space objects.Each eyepiece has 5 lens elements in 3 groups - with the exception of the 20mm eyepiece which has 4 groups.Experienced observers will truly appreciate such generous eye relief at significant magnifications.

The exit pupil distance of planetary eyepiece has achieved 16mm.

Planetary eyepiece is equipped with an eyepiece barrel which could be rotated for adjustment and a convertible rubber ring for eyes.

Planetary eyepiece has an excellent imaging quality well beyond common PL eyepieces.

Every surface of lens is coated repeatedly to ensure high contrast ratio.