Distinctive Characteristics
Of the currently available high resolution digital motion picture cameras, the Dalsa Origin, the SI 2K and the D-20 feature detachable optical viewfinders.
Some advantages of an optical over purely electronic viewing systems include:
- extremely high viewfinder resolution, with the option to zoom in on the image to check critical focus
- ability to set camera framing without need of a power supply
Some disadvantages an optical viewing introduces to a camera system:
- loss of light and sensitivity, as light has to go to the viewfinder instead of the sensor
- no monitoring of what is recorded on the sensor, only what appears in front of the sensor.
Electronic viewing options can be added to the camera. Typically, an additional monitor is used to both view and evaluate images for the camera.
The D-20 also accepts a traditional film style video assist system, sharing the image available through the optical viewfinder. This can be useful in Steadicam and remote crane applications where visibility outside the sensor capture area is preferable.
Like Arri mechanical cameras, the D-20 is modularly constructed so that both the mechanical and electronic components are upgradable over time, the camera however was discontinued in 2008 and the D-21 was introduced.
Read more about this topic: Arriflex D-20
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