The RAF conducted experiments and trials on ways to mount reconnaissance cameras onto multiple aircraft types.
You need to differentiate between camera mounted for strategic reconnaissance, usually on dedicated Photographic Reconnaissance types with purpose designed and built camera installations, usually with multiple cameras. That is when you go down the path of the decicated PR variants of the Spitfire, Mosquito, to a lesser degree some in theatre modifications of types like the Hurricane, Buffalo and Maryland and much lesser known Hawker Typhoon PR.1b, along with night time PR variant of the Wellington. Mostly used for vertical overhead photography, some limited used for oblique photography, usually medium to high altitudes, and rarer use at low level of dedicated PR types. Different objectives, different types of reconnaissance photography, much broader area of operations dictated by target type and tasking, some overlap with camera and lens types. Typically larger camera bodies taking larger format film types using larger focal length lenses covering larger areas from higher altitudes. Usually individual aircraft operations.
You then go to the medium to low altitude reconnaissance, more typically referred to as Tactical Reconnaissance. To a large degree low level oblique photography, with some low to medium level vertical photography. You start out with Lysanders, then transition to the concept of fighter reconnaissance with the Curtiss Tomahawk, then North American Mustang Allison engine variants, Mustang Mk I, Mk IA and Mk II. Throw in a few more types as the Mustangs become scarce, the Spitfire FR.IX, Typhoon FR.1b, Spitfire FR.XIVb/e, plus local in theatre variants of the Hurricane and Spitfire (V and IX modified for Tac/R work. Different objectives, different types of reconnaissance photography, area of operations more confined and defined, variety of camera and lens types and numbers of cameras carried. Typically smaller camera bodies (usually the F-24 or K-24), taking smaller format film, using shorter focal length lenses because they are closer to the target, from lower altitudes. Also different operating methods and tactics, usually operating as a 'pair' - camera and cover/backup.
When the RAF experiments with modified drop tanks in WW2, primarily the modified 'slipper' tank of smaller size and capacity as usually used on the Spitfire. So used on Spitfire V, FR.IX and FR.XIV and even some trials and use with PR.XIX. Various camera configurations trialed including single and dual cameras, forward facing, oblique and vertical. Trials also done using modified Hawker Tempest drop tank with a forward facing camera, both still and cine camera for capturing 'linear' targets eg front line trace, roads, rivers, canals, beaches in high detail at low level. A form of this drop tank installation was used post-War by the RN-FAA on Hawker Sea Furies during the Korean War.