focal lengths of erfles?

I'm curious to know what the range of focal lengths is/was for commercially produced erfles. I have two myself- both older Celestron models- a 20 and a 32mm.

Jess Tauber

I've seen also 16mm and 25mm celestron erfle's, both 80's vintage.

Michael

I have/had the following 1.25" Erfles:

Celestron 1980's 16mm, 20mm, 24mm, 32mm

Newer Celestron 1990's 20mm, 24mm

UO Super Erfles 16mm, 20mm, 25mm

Surplus Shed 41mm

I've never seen a 1.25" Erfle with a shorter FL than 16mm.

I have a 2-inch format 52mm focal length Antares Erfle, now out of production. It goes very well with my f/12 refractor.
Ron

Besides the 16mm and those already mentioned there is the older 16.3mm - sold by many supliers. Jaegers, Edmunds, and the other surplus suppliers also sold lots of "odd" FL Erfles in the late 50's through 60's, and early 70's when military surplus lens were plentiful...