Vary depth of field in film
The cmotion Cinefade system varies depth of field in a single motion picture shot at constant exposure, enabling the gradual transition between a sharp and a blurry background.
This is accomplished by using the new cmotion Cinefade motorized variable ND filter, which is paired to an iris motor on the lens.
This enables an iris change of up to 5 stops, while keeping exposure constant.
The Cinefade filter is compatible with most Arri matte boxes (LMB5/15/25, 4x5) and is fully integrated into the cmotion cvolution ecosystem via the LBUS protocol.
Its small and light weight design combined with its plug and play simplicity enables a unique cinematic effect in a very efficient way.
THE IRIS IS OPERATED TO VARY DEPTH OF FIELD.
A VARIABLE ND FILTER KEEPS EXPOSURE CONSTANT.
Why cmotion Cinefade?
There are various ways of compensating for the change in exposure caused by a varying aperture size. Shutter speed and ISO sensitivity could be slaved to the iris but these methods cause distracting motion blur and sensor noise and can not be employed over a wide variety of different camera systems.
cmotion Cinefade uses a variable ND filter that sits inside a matte box in front of the camera lens and is slaved to the iris. This solution is compatible with any digital and film camera system and cinema lens.
COMPATIBLE WITH ALL CAMERAS AND CINEMA LENSES.
Cinefade uses a light filter to compensate for the change in exposure rather than shutter speed or ISO compensation. The camera accessory is compatible with all film and digital cameras that use a cinema lens with manual aperture control.
ANY CINEFADE RANGE UP TO 5 T-STOPS.
Cinefade is not limited by the camera's shutter or ISO capabilities. It is possible to achieve a Cinefade of up to 5 T-stops within the lens limits without any loss in quality or undesirable artifacts, such as unnatural motion blur or sensor noise.
FAST AND EASY SET-UP.
The custom cmotion software and custom filter tray work together to allow fast and easy calibration of lens and filter tray at the push of a button, as well as full control over the Cinefade via a slider on the hand unit.
NO LOSS IN OPTICAL PICTURE QUALITY.
Cinefade uses high-tech polarizing filters to attenuate the light with no loss in optical picture quality up to 5+ stops of extinction. There are no undesirable artifacts, such as unnatural motion blur or sensor noise to worry about.