Back story...
The first time I used a diana mini, the photos I got were half exposed, half unexposed on a full frame. To make it worse, the lab I sent my photos to had a hard time scanning the negatives cause of it's "weird" format. When I got home to check the negatives, the scanner missed some of my favorite shots or only scanned a part of the shot I liked.
1 half frame good, 1 half frame bad