I've had two Panasonics, one Canon with in-lens image stabilization, and one Konica Minolta, one Pentax with in-body stabilization. With the Panasonic FZ10, the zoom range was ~35mm to 410mm FoV (35mm terms); the Canon I had 70-200 and 300mm IS lenses and a 1.4x teleconverter. With the KM A2, I had 28mm to 340mm effective FoV (with 1.7x teleconverter), and with the Pentax K10D I've tested up to 600mm (F100-300 plus 2x-S teleconverter).
For all intents and purposes, the practical advantages of in-lens and in-body stabilization have been the same with all of them. Theoretical considerations don't matter much. G -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net