 Reflections from the spinning propeller that may have interfered with pictures taken by a cowl mounted "gun" were avoided.The 2F.1 (the shipboard variant of the Camel), carried an over-wing Lewis gun, mainly as an anti-airship weapon.As the adaptation of either type of Foster mounting to a normal Camel was not feasible, a special mounting, officially termed the "Admiralty upper-plane mounting", became standard for the 2F.1.