The string will of course not totally replace a real tripod. But it can give you just that extra stop. This is the luxury model. - Thanks John for modifying the 1/4 bolt. The basic model is a simple piece of string with just a loop at each end. Put one loop around your camera and put your foot in the other. If you pull it tight, you win up to three stops. Cheaper than IS and so low-tech that it ex