The picture above was taken in British Columbia, during summer 2016, with a Canon 5DSR full-frame camera equipped with a Canon 70-200 f2.8L IS II USM telephoto lens.
A Westcoast Air (C-FGQH) Twin Otter floatplane (DHC-6) was about to land in the Vancouver Harbour. It is obvious that adjusting the shutter speed to 1/1200 would have given enough speed to obtain a clear image. But this would have taken away any movement sensation by freezing the propellers and background.
The shutter speed had to be slow enough to allow the rotation of propellers. It is clear that an aircraft’s propeller rotates more slowly on final for landing than during take-off. So the camera had to be adjusted for a shutter speed varying between 1/40 and 1/125.
A slower shutter speed increases the risk of getting a blurred photo, especially when the photograph must move with the camera to obtain the desired effect of movement. The fact that a telephoto lens is used also increases the possibility of a blurred picture. It is thus imperative to activate the stabilizer and horizontal panning function of the telephoto lens.
To obtain a background without any precise details, the camera is panning and follows exactly the aircraft’s movement. This requires a progressive acceleration of the panning, according to the aircraft’s position from the photographer.
When the Twin Otter gets closer, things get a bit more complicated as everything speeds up. It is necessary to already have positioned the feet in the appropriate direction in order to avoid a major switch in the body’s posture. The slightest useless or brisk movement would immediately be visible on the photo.
With a bit of practice, a photographer will achieve success by respecting the following elements: a shutter speed between 1/40 and 1/125, an appropriate position of the feet, no brisk movement while pivoting and a progressive acceleration of the body’s rotation aligned with the aircraft’s speed. A slower shutter speed will enhance the aircraft movement. But expect more blurred pictures when working with speeds between 1/40 and 1/60.
A last detail: as soon as the aircraft’s floats touch the water, the deceleration starts. The photographer’s pivoting speed must immediately slow down otherwise the photo will be blurred.