Another relatively cheap lens is the Panasonic 45-200 f4-5.6 OIS. Many complain about the quality but I thiink it's really good on the G1. I prefer using it on this camera because of the DSLR type grip, and the same goes for the Panasonic 100-300. I think this is one area that's much better on the Panasonic cameras over the Olympus counterparts. When using the Olympus 75-300 on any of the Pen cameras I find the lack of a grip on the camera is detriment to the stability of the system as a whole.