As can be seen, the camera windows were flat, in order to avoid any optical distortion during photography.

The oblique photographing technique called for the pilot to circle the target in a moderately banked left turn, firing off the camera as the target passed behind the wing.

Contrary to how it may seem, accurate sighting of the camera in this manner was a fairly easy task. The pilot simply used the wing’s contour to judge when the target came into sight of the camera lens.