B4 ENG Servo Zoom lens - 4K bicycling - - Dallas Video Production

Using a powered B4 lens to shoot some bicycling- keeping the subject size constant by using the servo zoom and constant aperture ENG lens. Lens: Canon J15x8 with internal doubler engaged. Camera: Panasonic GH4. UHD. 24p. ISO 200. Shutter ramped up to compensate for the low aperture and bright summer Texas sun. This is produced for by Anthony Burokas of To have your product reviewed, visit