Plössl – the popular and inexpensive all-rounder
Plössl eyepieces are the standard astronomical eyepiece and are affordable for everyone! This type is often found in accessory sets.
Plössl eyepieces always consist of four lenses grouped in two pairs. These pairs of lenses are cemented together, and each pair form an independent achromat, which means they exhibit few colour defects.
With a short focal length, however, the eye relief is a problem. This means: here, the ocular lens is so small that you have to get very close to the eyepiece. In this range of focal lengths, other eyepieces may make more sense.
The apparent field of view is about 50°.