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Product Description
Bahtinov focus mask to fit Canon EF-S 15-85mm Adapter to fit Canon EF 100mm f2.8 IS L Macro Without the adapter it will fit on lenses with 77-79mm outer diameter. With adapter it fits lenses smaller than 77mm outer diameter. (if more than a couple mm another adapter might be needed to keep the mask centered. Let me know and I'll see what i can whip up;) )
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