Technology Used in Digital Cinema Cameras
Canon's digital cinema cameras offer not only high image quality, but also superior mobility and expandability to meet the strict needs of professionals working in the motion-picture and commercial production industries. Canon's advanced technologies are opening up new possibilities for motion-picture production in the future.
Super 35-mm-Equivalent CMOS Sensor
New CMOS Sensor Realizes High Sensitivity and Superior Image Quality
Canon newly developed a Super 35-mm-equivalent CMOS sensor, offering an image size that is comparable to the frame size of film used in movie production, for use with digital cinema cameras for the motion-picture production industry. In addition to realizing a high pixel count, the sensor incorporates Canon's high-sensitivity and low-noise technologies for high-sensitivity, high-resolution images with a wide dynamic range. With an ISO sensitivity that ranges from 320 to a maximum setting of 20,000, the EOS C500 / EOS C500 PL, a top-of-the-line model enabling the capture of 4K-resolution video, makes possible high-quality video recording with a horizontal resolution of 1,800 TV lines.
Increasing signal read-out speeds, the new sensor reduces skew of fast-moving subjects caused by rolling shutter.
Canon Log Delivers Rich Image Gradation
Film production in Hollywood and throughout the world make use of Log, a standard encoding format for digitizing footage captured on film. Also called Cineon, the 10-bit format represents film negatives with a density of 0.002 using a digital value of 1, enabling film information to be recorded with a sufficient density range as 10-bit data, which offers 1,024 levels of color. Simply put, Cineon is a format for the digital copying of film.
The greatest benefit of Log is that users can digitally manage visual information offering a dynamic range that is wider than that produced by conventional video. Canon Log delivers video with a dynamic range similar to that offered by film, which is close to that seen by the human eye, capturing details of background scenery such as mountain ranges even when the exposure is adjusted to a nearby subject. A wide color gamut minimizes the occurrence of over- and under-exposed areas, making possible a wider range of visual expression not possible using video standard gammas.
The newly designed Canon Log Gamma draws out the full potential of the CMOS sensor to achieve an approximately 800% dynamic range, rich gradations, minimized occurrence of under-exposed areas and natural-looking image expression with subdued contrast and sharpness.
High Compatibility with Various Workflows
The benefits of Log data are also felt during the workflow. After extracting and adjusting the desired color-range information from the wide gamut offered by the captured video data, users can create finished works based on their tastes and creative targets-a process known as color grading. Workflows using Log data enable a wide range of video expression possibilities exceeding that offered by film.
The use of file-based workflows improves efficiency through coordination with major nonlinear editing systems. Visuals captured using custom picture settings or Canon Log can be edited by nonlinear editing software and color grading plug-ins. Video captured using Canon Log Gamma can also be converted to the Cineon format to allow efficient editing in combination with film footage. Users can record at the loss-less standard 24 frames per second, the same frame rate used when shooting on film, enabling video to be handled on the same timeline.