Ok, not just any button, it has to be a button you can screw into the cable release socket. It's to be used in a Meopta Flexaret IVa, this camera has a leaver which is sometimes not as handy as I would like it to be, so a button would be more nice. I know they exist because I have seen them on photographs on the web but I don't know the correct name for them. Anybody has such an item lying around or knows where to get it??
Many greetz from Belgium