Not interchagable, but...

I fashioned something to use as a pinhole, but it needs work. A sturdier tripod or at table or something. I may just use the mounting that I have for it and somehow make it fit on/in my series 6 adapter.

One photo for now:

great work. you are on your way. welcome to pinholing.
check out this site. it may have all the info you are looking for. http://www.f295.org/Pinholeforum/forum/Blah.pl?

eddie