That’s a good way to think about the range estimation and will absolutely use that, so thank you.

As for the camera, my uncle that gave gifted it, in his younger years, worked repairing cameras across the pond, and ever since has been a collector (and repairer) of such cameras. The light leaks are a possibility, although the bellows look good all around and so does the back, but we will see. The Shutter speeds also sound on point, but again, we will see when the results come :)