- World War Two / Post World War Two
- German (Luftwaffe)
- Reconnaissance & communications aircraft
- Fi 156 C-1: Three-seat liaison version. (produced in 1939–1940)
- Fi 156 C-2: Two-seat observation type, which had a raised, fully glazed rear dorsal gun position for mounting a MG 15 machine gun for defense. (produced in 1940)
- Fi 156 C-3: Replaced the C-1 and C-2 with a "universal cockpit" suited for any role. (produced in 1940–1941)
- Fi 156 C-3/Trop: Fi 156 C-3 + Filtered intakes (for desert conditions). (produced in 1940–1942)
- Fi 156 C-5: Addition of a belly hardpoint for drop tank or camera pod. Some were fitted with skis, rather than wheels, for operation on snow. (produced in 1941–1945)
- Fi 156 C-5/Trop: Version adapted for tropical and desert conditions. Filtered intakes. (produced in 1941–1945)
- Fi 156 C-7: Three-seat liaison version. "Flat" cockpit glazing similar to the C-1.
- Fi 156 D-1: air ambulance version of the C model with a larger cockpit and extra rear fuselage-location starboard-side door for stretcher accommodation. Powered by an Argus As 10P engine. (produced in 1942–1945)
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