My VOR antenna solution.
I'm not sure your camera specs or how you will mount it, but I'm guessing it will be in the forward fairing. No reinforcement necessary. However, does it really need to be that big? If it's the connector, consider assembling it after the cable is run. Especially, avoid the solder-type DB connectors in favor of the crimped-pin type. That way your conduit only needs to be large enough to accommodate the bundle of pins instead of a large connector body. My conduit was bigger than it needed to be but the last rib only has a hole large enough to accept a coax connector.
Patrick Kelley - Flagstaff, AZ
RV-6A N156PK - Flying too much to paint
RV-10 14MX(reserved) - Fuselage on gear
EAA Technical Counselor #5357