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Support Seamless Focus Gear Ring FAQ

What size rings are compatible with Canon lenses? Last modified 04/29/20

Canon Lenses Zoom Ring Focus Ring
EF 16-35mm f/2.8L III USM 78-80mm 81-83mm
EF 16-35mm f/2.8L II USM 78-80mm 81-83mm
EF 70-200mm f/2.8L IS II USM 78-80mm 81-83mm
EF 24-105mm F/4L IS USM 75-77mm 75-77mm
RF 24-105mm F/4.1-7.1 IS STM 78-80mm 75-77mm
EF 24-105mm F/4 IS II USM 75-77mm 75-77mm
EF 17-40mm F/4L USM 66-68mm 69-71mm
EF 70-200mm 62.5-64.5mm 69-71mm
EF 85mm F/1.8 USM * 69-71mm
EF-S 18-135mm F/3.5-5.6 IS STM 72-74mm 75-77mm
EF-S 18-200mm F/3.5-5.6 IS 78-80mm 75-77mm
EF-S 18-55mm F/4-5.6 IS STM 59-61mm 59-61mm
EF-M 18-150mm F/3.5-6.3 IS STM 53-55mm 53-55mm
EF-S 18-135mm F/3.5-6.3 IS 69-71mm 72-74mm
EF 100mm F/2.8L IS USM * 72-74mm
EF 50mm F/1.4 USM * 66-68mm
EF-S 35mm F/2.8 IS STM * 62.5-64.5mm
EF 70-300mm f/4-5.6 IS II USM 75-77mm 75-77mm
EF-S 15-85mm f/3.5-5.6 IS USM 72-74mm 75-77mm
EF-S 10-18mm f/4.5-5.6 IS STM 62.5-64.5mm 69-71mm
EF 70-300mm f/4-5.6L IS USM 85-87mm 81-83mm
EF 100mm f2 USM * 75-77mm
TS-E 24mm f3.5L Tilt Shift * 78-80mm
100mm f2.8L IS USM * 81-83mm
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