Owners of Broadcast Television Products seeking support can call 1-800-423-LENS (1-800-423-5367). You will be directly brought to a technical representative that can assist you with any inquiries.
You may find other links you find that may be useful. Our line up of Broadcast lenses are located under our website under http://www.usa.canon.com/
Products > Lens, Flashes, and Binoculars > Broadcast Lenses
You may also click the link below to also see the list of lenses we have available.
https://www.usa.canon.com/internet/portal/us/home/products/groups/lenses/broadcast/