I mounted a Nikkor 16mm fisheye onto a Leica via an adaptor:
Yeah, I know, crazy. But I like to play and photography is nothing if it's not fun.
I'm wondering if I can complete this contraption with a viewfinder. I found this on ebay:
Seems very low-tech, possibly featuring a 'lens' from a door viewer.
So, this is to ask, is there, or was there, ever a viewfinder for fisheyes?