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17mm Televue Plossl?

Started by kshouse, 03/14/2004 01:27PM
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Posted 03/14/2004 01:27PM Opening Post
Steve House
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Join Date: Aug 2002

Location: Holden MO, US

Posts: 30

Greetings all,

I just acquired a 17mm Televue Plossl eyepiece as a part of a larger deal, and am wondering about it. The current Televue line doesn't include the 17mm. Can anyone tell me the history of this eyepiece? How does it compare to the current line that includes the 15mm and the 20mm? Why was it discontinued? Many thanks!

-Steve House, St. Charles, MO
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Posted 03/14/2004 03:05PM #1
Dan D DuBal
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DrThud's avatar

Join Date: Apr 2002

Location: Wheat Ridge CO, US

Posts: 317

The *original* Tele Vue Plossl line included the following focal lengths: 7.4mm 10.5mm 13mm 17mm 21mm 26mm 32mm 40mm 55mm

The line was revised/redesigned in early '96, and the shorter focal lengths were shifted a little: 8mm 11mm 15mm 20mm 25mm (plus the 32mm 40mm and 55mm). This revision, I believe, coincides with a change in the Plossls' subcontracted manufacture. The optical design/layout of the Tele Vue Plossl remained unchanged.

Best wishes.
-Dan
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