The bag is from the studio days. We're talking mid 80's to late 90's. Mostly Nikon F3 and F4, and there were Mamiya's C and 645 series around. Went to digital from my F5 in 2004. I probably used the bag a couple of times after those days, but really, I don't think these were related to the cameras per-se, but to supplies for them. Probably disposable retainers of some sort.