Abstract: One embodiment of a manual focus driving ring comprised of two base rings (10 and 11), each having a through-hole near their edge (20 and 21), roll pins (17) conjoining the base rings, a pressure mount ring (16) adhered to the inner surface of the base rings, or a threaded mount ring (24), either of which frictionally secures the manual focus driving ring to the camcorder body (25). A sliding ring (12) is sandwiched between the base rings and slides along their outer surface of the base rings. An extension rod (13) with a gear (14) or friction-driven o-ring (23) is inserted into the through-hole in the base rings, and is rotationally driven by the sliding ring's inner surface, and a flanged tube (15) on the outer tip of the extension rod that acts as a focus driver and rotates in conjunction with the rotation of the sliding ring.