Canon FPD-400 (FPD400D) Digital focus servo demand. Canon's FPD-400D is a digital focus servo demand for use with Canon lens controller kits, such as the SS-41-20D, SS-42-20D, SS-41-IASD and SS-42-IASD. It provides precision focus control and is useful in a variety of professional broadcast applications.
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Canon ZSD-300D (ZSD300D) Servo Zoom Demand (remote) for Digital Drive ENG/EFP Lenses. Canon ZSD-300D Digital Zoom Servo Demand - for J21, J16, J11, HJ21, HJ18, HJ16, HJ11 and HJ11 Digital Drive ENG/EFP Lenses. The ZSD-300D zoom demand will operate the shuttle shot and frame preset features of the lens. All digital demands connect to the lens via a new one-touch 20-pin connector.