Cool, thanks a lot.
My Iscorama is made of plastic - are the .36'ers the same - or are these with metal-housing?
And another thing - what kind of adaptor to choose - from Nikon to Canon EF? The one that came with it, is a kipton - feels a little cheap - and not totally tight. I see that most recommend the Novoflex, but are there any others I could look for.