Not sure if this is the correct place to post my question? Just a few days back, I bought an Olympus 11mm-22mm 2.8-3.5 lens. I have a question here, so when at the wide end its aperture is f2.8 and at zoom its aperture is f3.5? Am I right to say so? Please correct me if I am wrong. And if i have set the aperture to anything more than f3.5 or more like f22 on my cam(E510), the image will not longer be sharp and focus like when its aperture is in the limted range (f2.8-f3.5)? Please kindly enlighten me on this issue. Thanks all in advance For your info - I have tested a few images with the landscape mode to see what is the f value used by the cam. Its like f3 to f4. And this is based on the calculation of the cam.