The indiPRO Tools Follow Focus unit is mounted on an angle and is adjustable on just about any lens attached to a DSLR camera. Simply adjust the sliding follow focus in or out, and you can easily control focus. The black fascia of the focus knob also allows you to use a white grease pencil to make your focus marks. At under $119 the indiPRO Tools is a must have follow focus to have in your kit and the upgrade to include the Baseplate to the Follow Focus system is just under $200.
The BASEPLATE is made from Aircraft Grade Aluminum with industry standard 15mm rods. The camera mount has the standard ¼-20 mounting screw as well as provision for tripod mounting of either ¼-20 or the larger 3/8-16 mounting.
See indiPRO Tools for more details.