Motion, Video & Creative Techniques

Using cast shadows as the primary graphic element of a photograph.

Rendering out-of-focus highlights as a chosen shape by placing a cut-out mask over the lens.

mm (aperture cut-out)

Motion, Video & Creative Techniques

A way of expressing shutter speed relative to frame rate, inherited from the rotating disc shutters of film cameras.

Shutter speed = 1 / (fps × 360/angle) degrees

Motion, Video & Creative Techniques

An image in which the subject is rendered as a dark shape against a much brighter background.

stops

Motion, Video & Creative Techniques

Footage recorded at a higher frame rate than its playback rate, so action appears to unfold more slowly.

Slowdown = capture fps / playback fps ×

Motion, Video & Creative Techniques

Combining flash with a shutter speed long enough for ambient light to register, so a sharp subject sits within a blurred environment.

seconds

Motion, Video & Creative Techniques

A motorised mount that rotates the camera to match the Earth's rotation, allowing long exposures without star trailing.

Sidereal rate = 15.04″/s arcsec/s

Motion, Video & Creative Techniques

Arcs traced by stars across the frame as the Earth rotates during a very long exposure or a stacked sequence.

15° per hour of rotation minutes

Motion, Video & Creative Techniques

A mechanical stabilising system that isolates the camera from the operator's movement using a counterweighted arm and vest.

kg

Motion, Video & Creative Techniques

Animation created by photographing an object frame by frame, moving it slightly between exposures.

fps

Motion, Video & Creative Techniques

Firing a flash repeatedly during a single long exposure, recording a sequence of positions in one frame.

Positions = frequency × duration Hz