So far I've not be able to figure this out. The switch over year from old C style film magazines, to A versions with flip-out crank. I can figure when a magazine was made, but then there are a number of 500C bodies with A style backs and want to know the break year point to narrow down search.
Every product catalog I have starts in mid 70's, not very useful for this.
When were C magazines "supplied with dark slide holders" ?
As far as I know, A and E magazines were supplied with them, after 1994.
C magazines were build until early 1970s.
Source: https://www.kenrockwell.com/hasselblad/a12.htm
I have both C12 and A12 and while both are really precise pieces on machinery I like the old C12's the best. Just me of course, but I sure like seeing that my 1st exposure is really my first exposure. I've also had less malfunctions, in fact none that I can remember, with the C12 backs. If I were back shooting weddings my choice might be different, but for my own use I'll pick a clean C12 back every time.
Really? From what I read is that ceteris paribus the C magazines are somewhat more temparamental, especially when it comes to their interplay with the magazine inserts. Later versions are said to be less reliant on "matching numbers".
About ten years after the demise of my 1000F, I bought my 2000FCM and continued to use my old film magazines until about 15 years ago, when gradually replaced as they died. I probably could have resuscitated them, but decided to go modern.
It is not that the focal plane shutter Hasselblads are not available - they have just become very expensive. Maybe that is because there are fewer left, so the remaining ones have gone up in price?
Really? From what I read is that ceteris paribus the C magazines are somewhat more temparamental, especially when it comes to their interplay with the magazine inserts. Later versions are said to be less reliant on "matching numbers".
Magazine matching problems may exist, but my inserts all match. In read what Ken Rockwell had to say about matching inserts and having to shoot on a tripod at f22 if they don't match. That, to me, is hogwash. I got three A12 backs in a trade and all three had non-matching inserts, but I've never missed focus with any of those. They are my backups, but I have shot them all just to make sure things were Kosher. If folks here have any lonely C12 backs with matching inserts that they are going to give to the Salvation Army Store or Goodwill, please don't! Just send them to me and I'll even pay postage. Nuff said!
Magazine matching problems may exist, but my inserts all match. In read what Ken Rockwell had to say about matching inserts and having to shoot on a tripod at f22 if they don't match. That, to me, is hogwash. I got three A12 backs in a trade and all three had non-matching inserts, but I've never missed focus with any of those.