Eyepiece identity?

[chiltonstar]

Anyone able to identify this eyepiece please? Bought about 1982, it is marked "Or 9mm"  and is therefore presumably an ortho. It is a very able performer, great with my 180 Mak, although it is not an EP for spectacle wearers!

The nearly unreadable yellow label on it shows it is of Japanese origin. I took the barrel off to clean the outside optical surfaces up, and it appears to be very well put together.

Chris

 

Edited June 5, 2020 by chiltonstar

[haitch]

Looks like a Circle T - if that's a T in a circle on the chrome barrel... and yes, it's an Orthoscopic

Edited June 5, 2020 by haitch

[haitch]

Some of it's brethren... http://ensoptical.co.uk/circle-t

If you look at the 25mm Ortho on there it's got the stamp on the barrel like yours but the 9mm they've got has a sticker on the barrel - I think that's just down to when it was produced

Edited June 5, 2020 by haitch

[John]

One of the much renowned Circle-T abbe orthos. Proper 3+1 optical layout. Still very strong performers. I wish the more modern ortho designs had been of the "volcano top" style. Lifts that eye lens toward the eye so helping with the usual tightish ortho eye relief.

You used to be able to get these for peanuts but I've noticed that the used prices (they are well out of production) have crept up to equal the likes of Tele Vue plossls now and rightly so.

I used to have some of the University Optics branded versions - wish I still had them

 

[chiltonstar]

Thanks very much guys.

It is a nice performer, maybe another one or two for the EP case!

Chris