When set to 90mm, this will create a moderate amount of background blur for portrait photography.

They all share an identical optical design of 10 lenses in 8 groups and 5 aperture petals.

[6] The lens is a very lightweight design, and has fast auto focus even without USM.

Image quality suffers, though, particularly between 28–35mm and 80–90mm, and there is heavy vignetting when used wide open.

For digital EOS cameras with APS-C sensors, the EF-S 18–55mm lens covers the same focal length range.