US 12,032,221 B2
Follow focus apparatus
Sarorn R. Sim, Detroit, MI (US)
Filed by Sarorn R. Sim, Detroit, MI (US)
Filed on Jul. 30, 2021, as Appl. No. 17/389,609.
Claims priority of provisional application 63/058,565, filed on Jul. 30, 2020.
Prior Publication US 2022/0035120 A1, Feb. 3, 2022
Int. Cl. G02B 7/02 (2021.01); G02B 7/04 (2021.01); G03B 3/10 (2021.01)
CPC G02B 7/04 (2013.01) [G02B 7/026 (2013.01); G03B 3/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A follow focus apparatus for focus adjustment of a camera lens, the follow focus apparatus comprising:
a gear ring including an outer surface and an inner surface, the outer surface having a plurality of teeth extending radially outwardly therefrom and the inner surface having a cavity defined therein, wherein the cavity is in the form of a radial channel having a recessed wall, a front wall and a real wall; and
a sizing ring releasably coupled to the gear ring, the sizing ring including an inner ring body dimensioned to extend over the front wall and the rear wall defining the cavity, and an outer ring body coaxially coupled to the inner ring body, the outer ring body dimensioned to be seated between the front wall and the rear wall defining the cavity, wherein:
the outer ring body defines a first length, wherein the first length of the outer ring body is sized to be received between the front wall and the rear wall of the gear ring; and
the inner ring body defines a second length greater than the first length, wherein the inner ring body extends substantially equally from a first side of the sizing ring and from a second side of the sizing ring.