I am looking at buying my first camera for outdoor zoom shots.I have it narrowed down to just two at this point. The Canon PS SI 1S & the Panasonic FZ-3, both which have an image stabilizer. The reviews have the main problem areas as trouble focusing in low lights for the Canon, and for the FZ-3 occasional vignetting. The prices are about the same but a nother nice feature for the Canon is the ability to add an adapter & lense extension for a zoom of around 600mm. Does anyone have any extended usage comments on either model that you have owned or own at this time. Thanks for any help.