After years of research and consultation with filmmakers, JVC has come to the conclusion that the most essential component of digital cinematography is the ability to use the selfsame film lenses. To achieve this with JVC's ProHD camcorder range, which already offers true 24 fps shooting, JVC's engineers implemented an all -optical relay system that takes the image from the film lens and converts it in the correct proportions to the camcorder's imaging device, whilst still preserving the depth of field (DoF) and angle of view characteristics.
The result is a relatively small, lightweight optical tool that enables the use of 16, Super16 and 35mm film lenses with a PL mount on the JVC ProHD series of camcorders. This is the JVC HZ-CA13U Cine Optical PL Adapter. With the HZ-CA13U, JVC claims that there is minimal light loss, say, half a stop at the most.
There are many advantages to the HZ-CA13U Cine Optical PL Adapter. First is the characteristics of the optical relay system. DoF and field of view of the film lenses are virtually matched with that of film cameras, preserving the visual essence of the optics.
The adapter will accommodate a wide range of lensing options, in particular the large implementation of existing 16mm film lenses. Super16mm and 35mm lenses can also be used with no vignetting in the image. As the construction is optical there is virtually no loss of light - approximately 0.5f.
In addition, there is a back focus adjustment to ensure proper and optimal setting of the film lens. Also, the 52mm focal plane is clearly marked as a groove on the barrel, and a 1/4" 20 screw hole at the base of the barrel allows the use of adapters for camera support systems.
The compact and lightweight construction of the adapter enables the camera system to be used in small spaces and tight quarters, as well as being ergonomically stable for a variety of shooting styles and applications.