Collapsible lenses on R2?

[scottgee1]

Wondering which collapsible lenses can be safely used on an R2.

Tried to search the archives on this one, but didn't find much . . .

TIA!/ScottGee1

[rover]

Always consult the Bessa Bible, First book of Gandy

http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=00Aw1p

That is the R2 page, scroll down to the bottom.