5mm - BST Explorer Starguider 60º ED Super Planetary Eyepiece
Two elements out of the 6 optical elements are made of ED (Extra-low Dispersion) glass to provide excellent sharpness edge-to-edge, a low level of chromatic aberration, and very well managed astigmatism, making this eyepiece a real competitor to much more expensive eyepieces.
These extremely sharp 60° eyepieces have a 16-20mm eye relief. The contrast is enormous; one can compare them with other planetary eyepieces such as orthos. At the same time, they give us a larger field of view and a more relaxed look for the money than a conventional Ortho.
This is the Rolls-Royce version of our range of eyepieces sold under "the Planetary."
- 16mm eye relief
- Uniformly 60-degree field of view
- True flat field performance
- 5 or 6 lenses in 4 groups
- All lens surfaces are multi-coated (fully multi-coating)
- Rubberized body
- Retractable eyecups
- Weight: approximately 170g
Distortion stays low even with bright (around f/5) telescopes.
These eyepieces are being sold under various brand names like BST Explorer, BST Starguider, Olivon, Astrotech Paradigm.
