Yet another part of the collection I acquired.
**Selling these as a bundle only**
- Vixen 9mm ortho in excellent condition. Tested on Jupiter tonight and gives sharp, contrasty views.
- unbranded 6mm HM eyepiece
- Moon filter (0.965" fitting)
- Tele Vue 0.965" to 1.25" adapter
- both eyepieces come with plastic cases
I've Googled 'HM' and apparently it stand for Huygenian Mittenzwey. According to one website "The Mittenzwey eyepiece is a small improvement on the Huyghenian, replacing the planoconvex field lens by a meniscus lens."
The HM 6mm is sharp only in the central 50% or so. It's more of a collector's item than something you're going to use regularly IMO.
Asking $50 or best offer for the bundle.
Enquiries by PM please.