F49

The Williamson F.49 Mark 4 air survey camera was a further development of an existing type with greatly improved photogrammetric performance, so that the photography could be used with first-order plotting machines. A new lens provided minimal distortion, high resolution and greatly improved marginal illumination. An entirely new shutter provided high speeds and efficiency. Laboratory results and preliminary survey trials indicated image quality and location standards of the same order as established existing cameras, such as the K17B.


 * Avro Lancaster PR. Mk I
 * English Electric Canberra (PR Versions)