Old Zeiss Eyepiece Info Needed
Posted 18 October 2004 - 05:58 PM
I need some help please.
A friend of mine has come into possession of a weird eyepiece, and needs some help to identify, and perhaps value it. Neither of us has any idea of either it's history/purpose/value.
It is marked "Carl Zeiss Jena, Orthoskop - Okular f= 18mm"
It has a focus ability with graduation from +12 - - 12.
It has a screw thread on the field lens end, with a very coarse pitch, about 31.5mm (but it is very coarse). This thread fits his old brass Watson refractor.
When you look through the eyepiece it has a circular ring, blackened, in the centre. The inside of this ring is an aerial view, and the outside of the ring is through the perspex/clear material that makes the ring. The ring proper is about 5 - 6 mm in diameter, and is visible from the field lens side. The blackening of the circular ring comes from it being cut on an angle, and the material transfering the interior blackening. Hard to describe, but simple in practice.
A photo is attached.
Any info is appreciated, either back on this forum, or direct to me at firstname.lastname@example.org
Posted 18 October 2004 - 06:00 PM
Posted 18 October 2004 - 08:06 PM
Posted 19 October 2004 - 12:14 AM
Sadly, however, no pictures.
Good luck, and let us know what you find.
Posted 19 October 2004 - 01:14 AM