
I think IS is Canon's marketing ploy to try and get people to regularly buy the newest available lens. Next they will be introducing the UIS... (Updated Image Stabiliser)... then perhaps the NIUIS... (New Improved Updated Image Stabiliser).
Don't think Nikon are a threat though coz it costs too much to junk all your kit and to start all over.
and don't forget.... "If you can....Canon can?
Reaperman
----Brad---- 
