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15/16" eyepieces

PostPosted: Sat Oct 07, 2006 10:20 am
by asterixhb
I am currently doing up an old 4 1/2" F8 Tasco relector (model 11t) for a friend's teenage son. The only eyepiece it has is a 4mm one. (written on it SR4mm). The outside diameter is approx 15/16" or just over 24mm. Does any one have any more suitable redundant eyepieces to fit that they wouldn't mind donating (or negotiate a price should you wish.)

Thank you.

RE: 15/16" eyepieces

PostPosted: Sat Oct 14, 2006 9:30 pm
by gneiss
It's the old Japanese standard 0.96"...

What you need is a 36.4mm thread to 31.7mm push fit adaptor. These used to be readily available so I would try googling "36.4 to 31.7 adaptor".

Please check this by uscrewing the existing adaptor which should readily unscrew and measuring across the thread - but these were pretty standard across all makes in Japan.

The new adaptor will be a direct screw in replacement and will allow you to fit standard 1.25" accessories. PLEASE keep the original adaptor safe so you can restore the scope to it's original state if required.

Good luck with the restoration and please post a picture...

Here's my 1966 3" f = 1200 F/16 Tasco with the same mod I have just described.


RE: 15/16" eyepieces

PostPosted: Sat Oct 14, 2006 10:20 pm
by gneiss
A better description... EA 36.4mm to 31.7mm; Standard 1¼" Eyepiece Adapter.

Vixen used to market these...