OK...my (ignorance) mistake then.
I will hunt Ebay for a flash or two.
Sorry to ask, but this is All New To Me:
1. Do most flash units of the 1975-1985 time frame fit most cameras, or do you need to find something that is brand specific.?
The camera manuals list some flash units, but that was from 30-40 years ago. Are those still the best units to look for, or did somebody like Vivitar make a flash that was compatible with a lot of brands.?
2. I was going to ask about metering, and sync speeds, and when a connection is TTL, etc etc.
I should probably get a few flash units first, and see what i can figure out on my own with the flash and camera manual.
It is all, kind of, daunting when you have never used a flash before. I realize that some of the flash units have a guide on them also.
Thank You
Back in the day, a hotshoe with center pin and edge contact only, was universal in being triggered by any camera. The hotshoe only provides the same functionality (trigger) as a PC cable with two conductors in the insulation.
Then manufacturers started to display 'flash ready' and 'flash exposure OK' lights via additional contacts, and the hotshoes became specific to the manufacturer. But the center pin and edge contact still were universal and you could still trigger via PC cord without any of the 'dedication'
Then manufacturers added TTL to the cameras, and more contacts were added to tell the flash 'no more light' when TTL metering felt it was enough. But the center pin and edge contact still were universal and you could still trigger via PC cord without any of the 'dedication'.
Enter the world of digital, and yet another contact was added to the hotshoe, this time to command the flash to go into HSS or for it to get commands for a certain amount of light, after the pre-flash signal was sent and metered by the camera.
In many cases, manufacturers like Canon made their own flash units back compatible to TTL cameras as well as for eTTL in digital, as well as back compatible for some intermediate (and since abandoned) xTTL versions in between.
The independents like Metz made their customizing modules also compatible, in some cases needed different models of modules for cross-camera compatibility even in the same brand. Brands like Metz are fairly easily switched in compatibility from brand to brand simply with a module...my Metz 45 is compatible with my 1981 Olympus OM-1, my 1984 Olympus OM-4 with TTL, my 1994 Bronica ETRSi with ETTL, and my Canon 40D but not with its eTTL...I have to use a Metz 54 to get Canon 40D eTTL (
and support of all the other cameras that I listed).
You are likely to need some insulating material (e.g. mylar 3M Magic Mending tape) to insulate the extra pins from making contact, in order for a Brand X camera to work with Brand Y flash using the center trigger pin and edge contacts only.