A s with distortion, all of the lenses on test do well to keep colour fringing to a minimum. In-camera corrections are available in current and recent Canon cameras for all of the own-brand Canon lenses in the test group, as well as for the Sigma lenses, although early examples of may need a firmware update, which can be applied with Sigma’s optional USB Dock. In-camera corrections are unavailable for the Samyang and Tamron lenses.