Terry Danks wrote: >>The image becomes jumpy as IS attempts to do what is an impossible job >>for it. IS may or may not work in mode 2 for panning an object moving in >>a well defined horizontal plane, such as a sports car. For a bird >>approaching overhead at an oblique angle it is not useful.
Jess Lee wrote: >That is a very interesting conclusion and contrary to hundreds of other >users findings including mine. The first 100-400 IS lens that I owned behaved in a manner similar to that which Terry describes. Intermittently, the image would jump around in the viewfinder. Unlike Terry, I found that it happened even when I was not panning. When I finally managed to persuade Canon that there was a problem, they replaced the lens. Prior to that, Canon kept thinking that I was referring to the "normal" brief jumpiness as IS engages or disengages. The replacement lens does not get the jitters, and nor does any other IS lens that I have used. Terry, have you observed this jumpiness with more that one IS lens? Gerry * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
