18 mm is the wide angle focal length and 200 mm is the telephoto limit of the zoom. for more info searching on focal length and field of view will give you lots of info.
Digital Camera
S = Single L = Lens R = Reflex
I think you mean "SLR". It stands for Single Lens Reflex.
A photographer also uses a lens protector, a stand, an interchangeable lens, and much more equipment.
IS means 'Image Stabilizer' where in Canon Camera's a portion of the lens is moved to counteract camera shake which can cause blurry images.
No, this is a point & shoot camera and there is no lens mount. The lens is fixed on the camera and cannot be removed.
You can't. The lens on a Canon SD950 is integral to the camera body. Trying to remove it will ruin both the camera and the lens.
The focusing lens of the camera
A camera lens.
bioconvex lens
Basically most video cameras are fixed lens so you cannot put a camera lens in it unless it is specially built.
The camera lens reflects off what the lens is pointed at so that you can see it through the screen on your camera.