>
> My favorite camera store recently got some used eyepieces to sell on
> consignment. (including some Clave oculars!!). The barrels are listed as
> 1.25", 2", "Japanese", and "European".
>
> I know that "Japanese" is 0.965", but what is "European" ??????? Is it the
> same size as "Japanese", or something different?
>
> -- Gerry
>
Something like a "European" barrel size for eyepieces in telescopes is not
known here. However, before the US and Japanese standards took over, say
in the 60's and 70's, 31.0mm was a quite popular size at least in germany.
Alternatively, if some eyepieces come from use in microscopes, they may
have sizes of 30.0 and 23.5 mm - so better be prepared for any surprize.
Klaus-Peter Schroeder