Universal Donut Adapter Ring (for 80mm & under lenses)

Ideal for DSLR or other external focus lenses

Can be used on almost any lens with a front outer diameter between 50 & 80mm - *note: even though the filter thread may be below 80mm  (ie 77mm filter thread) the lens barrel may be larger; in that case use a threaded adapter ring such as AR82-77D6 instead 

Useful for lenses where the front element moves inward & outward

Can be used in Cavision 3x3 matte boxes directly or in 4x4 & 4x5.65 matte boxes with the back-mount stepped down to 85mm (using ARP series adapter rings)

Fits into matte box back-mount diameter: 85mm

Front O.D.: 85mm

Depth (when cloth fully open): 45mm

Fits lens size:~ 50mm to 80mm (lens front outside diameter)