"航空用照相机" can be translated as "aerial camera" or "camera for aerial use" in English.
"Aerial camera" is a more concise and commonly used term in the field of aviation and photography, referring specifically to cameras designed for aerial photography.
"Camera for aerial use" is a more descriptive phrase that clearly indicates the camera's intended application.
Both expressions are correct, and the choice between them may depend on the specific context or preference of the speaker.