I recently got a GF1 for a great price on eBay and, as money was tight at the time, bought a Pentax K adapter so that I could use my Pentax-A SMC 50mm f/1.7, Pentax-M SMC 50mm f/2 and Tokina 80-200mm f/4.5. When I would look into buying a used lens on eBay depended on my experience of these lenses. - The Tokina was quite a bit of fun but not 160-400mm is not really a focal range that I use so this will be kept in the lens drawer gathering dust mostly. - The 50mm lenses both suffer from the same problem and I'd assume that this is true of most 50mm lenses on the GF1. I've been using the camera in aperture priority mode and shooting mostly between f/2 and f/8 using the 50mm f/1.7. I have the camera set to iISO. These settings have produced some really sharp images in bright light but the moment the light begins to fade, the camera begins selecting a shutter speed of 1/30 and trying to keep the ISO quite low (I haven't got a limit on the ISO). This means that almost all of my photographs suffer from pretty bad camera shake. I know that the GF1 doesn't perform too well at high ISO but is the only way I can resolve this problem to get out of iISO or auto ISO and set it somewhere between 800 and 1600? I had hoped that the 50mm f/1.7 would be a good low light lens but it seems that the 2x focal length multiplier and the GF1s poor noise handing at high ISO has slightly scuppered my plans. I'm now looking at buying a 20mm f/1.7 or, at a slightly lower price, a 14mm f/2.5. EDIT: First post. Hi all.