I just came across this link, a bloke using a piece of string, a screw and a washer to stabilise his camera. No reason why (if it works at all) it shouldn´t work with an ED50. Has anyone tried it?
http://www.youtube.com/watch?v=LLlJl7TbXTA&feature=fvw
http://www.youtube.com/watch?v=LLlJl7TbXTA&feature=fvw