Our lens hood for the Fujinon XF 23mm f2 and XF 35mm f2 is a bayonet mounted lens hood. It will fit both of the XF 23mm f2 and the XF 35mm f2 Fujinon lenses. The photographer can still use their 43mm filter under this hood. The hood is a total of 18mm in length, but only adds 9mm to the overall length of the lens, as the hood also comes back towards the focus ring, which creates the illusion  that it is a continuation of the lens rather than an obvious add on like other hoods available for these two lenses. Each hood comes with 1 rubber lens cap.