Indeed and with the Pentax there is quite a diverse range that one could use, as per the above link...
Bought my Canon in 1978..took it with me to the Algerian desert, all over Africa, and used it here in Oz for a bit...now there is fungus growing in the lenses...The Chinon is still good though..but digital is the way...now I have to convince the better 1/2....
As I was mentioning before...do we have to worry about old stock on the K7?