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I recently bought a Mamiya 645 Pro TL with a lens, grip, viewfinder, and film back. It’s a medium format camera. To test out that all parts were working as advertised, I put a roll of film in it and went to work. I tested the auto-exposure and manual exposure. The film advance in the grip, too. Everything worked. Focus was on the little lamp, leaving the flowers outside the field of focus. In post, I used Negative Lab Pro to process the images, but turned them to black and white in LR. Altogether, I am happy with my purchase. And I managed to get a few pictures that were decent out of all that play!
The Glass Aerie 
Seems strange to me anyway, to focus on the lamp nearly out of the shot, when the flowers seem to be your subject.
I agree. However, I was just putzing around with DOF and the lamp seemed to be easier considering my old age and the lack of agility to crawl around! Creak. Creak. Creak. 😉
🥴🤣