I used to have one like that for the old Minolta. If you mount a teleconverter, then the "extension tube" then the normal lens you can get even better magnification, in my case I got a 7/8" field of view.

Unfortunately, the EOS teleconverters are way too pricey to do this with so I went ahead and got some bona fide extension tubes on Ebay to use.
Then theres the Bronica......$$$$