* Astronomy

These planetary eyepieces have a revised, modified Plossl build, 5 lenses in 3 groups (the 9 mm eyepiece has 6 lenses in 4 groups), of course, all multi-coated lens surfaces (fully multi coating). Distortion stays low even with bright (around f/5) telescopes.

- Uniformly 20-mm exit pupil 
- Uniformly 16 mm eye relief
- Uniformly 58 degree field of view
- Focal length is written on two sides of the eyepiece in capital letters for easier selection of the right eyepiece in the dark.
- Adjustable (can be screwed out) rubber eyecup.

£46.98

Coating: Fully multi-coating
Focal Length: 2.5, 3.2, 4, 5, 6, 7, 8, 9,mm
Field of View: 58°

Read more

Ed ~ A nice eyepiece with clear and sharp views. The eyepiece, which is typical for this design, suffers from the annoying 'kidney bean blackout' effect.  

The eyepiece uses quite a lot of glass elements, which at first seems not good news for a planetary eyepiece which demands bright and contrasty images at high power; But the eyepiece is well designed and fully multicoated, and provides sharp and flat edge-to-edge high contrast images, with almost unnoticeable chromatic aberration. 
The chrome barrel is threaded for standard 1.25" filters and has a capture ring to help reduce the chances of accidentally dropping the eyepiece out of the focuser.  The eyepiece has a fold down rubber eyecup, plactic and rubber body, and a long (16mm) eye relief.

Pricewise the eyepiece offers very good value compared to similar performing eyepieces that are double the price.

See also SkyWatcher Planetary UWA eyepiece