Bolsey B2 (XT2, adapted Minolta 35-105mm w/14mm extension tube)
Just put in a PC sync port on an old film camera and had the shutter open to set the flash timing. B2's were a $73 camera in the 40's/50's and I found this one at a yard sale a couple years ago.
Lens is a Minolta 35-105mm Macro with an adapter. Can get a lot of focal lengths for much less if you can enjoy manual focus!
Got it cleaned up and working again, though it's not a great photo taker.
Also been playing with stereo photos and shot a pair with the camera offset a few cm. The viewers are cheap on eBay and make for a bit of extra dimension in photos, though I haven't been able to do much this past year due to illness.
