Hi I have a refurbished Agfa Billy Record II. I thought it would be a good idea to use it on a tripod, and I wanted to use a cable release. This camera has the Solinar lens and a Compur Rapid shutter (thanks to Jurgen Kreckel). I recently bought a cable release - because I learned that if you unscrew the top shutter button there are threads underneath it. The only problem is that the cable release I bought is too thick or too large in diameter to fit into the threads on the camera body! I don't know what to buy that will fit, because I don't even know the correct terminology. Can someone please tell me what is going on with this problem? I'm mystified. I'm happy to buy another cable release, but I just have no idea what's going wrong. Thanks in advance for any help.