Cassini-Huygens

Well I need an older style camera.The ones were you can hold the shutter open yourself.It should have like a hole in the bottom with some threads.Thats were you can screw in a cable that allows you to open and close the shutter yourself.My telescope is a Nathan brand.I built this one myself.Its a 1200mm reflector.If you are interested I can post some pics of it.