I'm aware that most lenses have a certain aperture where they produce the sharpest image; anyone know of a site of where to find this information for any lens? I'm currently looking for what the sharpest aperture on the 55-200 AF-S VR is.
most lenses will give their sharpest 4-5 stops down.usually the centre of of aperture range of the lens is a safe bet to assume overall sharpness or at least good sharpness even at the edges of the frame. with the 55-200 u dont have to worry its sharp in the centre all thru and best sharpness again as said above. if sharpness was very critical id shoot it at f9-f11.