IS is available in some of Canon's lenses designated by the IS in the name of the lens. You don't always need IS in order to shoot a good photo. Yes the use of a tripod and a remote will work in low light situations, or you can learn to use your equipment. The camera is quite heavy, as is that particular lens, make sure that the tripod you buy is a strong one, which will support the weight of your camera and lens, and perhaps future lenses you buy.