These are just some shoots of humming birds at our feeder. Those whose exif show 105mm were made with my Olympus E-620 and my 18-180mm lens. Those whose exif shows 90mm were made with the E-620 using a Leica 90mm. Those show an aperture of 2.8 which is the maximum aperture and what the adapter was programmed for. The actual aperture was typically f/5.6. All of these shots were available light and were hand held. I just added three more taken with my E-3 using my 14-54mm lens together with the 1.4 extender (EC14) and also using my Olympus flash FL36. These are probably the sharpest owing to the lens plus flash.