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The Cavision 56-59mm Follow Focus Gear Ring clamps around a lens' focus ring to allow use of an add-on follow focus system. This gear ring is specifically designed for lenses sized between 56-59mm.
Note: For DSLR lenses, focus barrel size does not correspond to filter thread size; please measure the diameter (or circumference divided by 3.14) of the lens' focus barrel to determine the correct gear ring.
Can be clamped onto the focus ring of video, film or DSLR lenses, allowing for the use of a follow focus.
All rings compatible with standard Fujinon (mod 0.6) gear type.