Originally posted by pres589 I'm curious how many cameras Cosina would have had to make for you to not consider them minor... Ricoh owns Pentax, does that make Ricoh minor?
I know that Cosina made cameras (and camera parts) under contract to other companies which were sold under those other names as well as their own, and of course that Ricoh own Pentax today. However, as I remember things in the UK in the 1980s (when I became interested) there were not many SLR cameras in the shops with the Ricoh and Cosina names on them. There were plenty of Ricoh point and shoot cameras though (I still have one myself). At the time I had also heard of Petri, Mamiya and the original Miranda, but I think those had ceased making 35mm SLRs by then.
Around that time the old Miranda brand name was bought and revived by Dixons, a UK high street hobby tech shop, and they used it on a range of budget photo equipment; this included K-mount 35mm SLRs which Wikipedia tells me were made for them by Cosina. The screen shot below shows one on Ebay just now - they do not fetch high prices, and this one did not sell by the way.
The dominant SLR brands in the UK back then were the "big five" : Canon, Minolta, Nikon, Olympus and Pentax. Also present were Fujica, Leica, Yashica, Contax and Praktica, but in smaller numbers. Outside the UK it may have been different.