The Redrock Micro microLensGear size B 0.8 film pitch mod 32 provides film-pitch gearing for 35mm still lenses. The A gear fits lens focus rings with a circumference of 211mm-250mm. It comes with large and small fastening screw sizes.
Here are some common Canon EF (EOS) lenses and their corresponding lens gear size
Canon EF L ens -
• 14mm f/2.8 L - Diameter 75mm - Use Lens Gear B
• 16-35mm f/2.8 L - Diameter 76mm - Use Lens Gear B or C
• 16-35mm f/2.8 L II - Diameter 76mm - Use Lens Gear B
• 17-35mm f/2.8 L - Diameter 76mm - Use Lens Gear B
• 20-35mm f/2.8 L - Diameter 77mm - Use Lens Gear B or C
• 20mm f/2.8 - Diameter 75mm - Use Lens Gear B
• 24mm f/1.4 L - Diameter 80mm - Use Lens Gear C
• 17mm f/4.0 Tilt Shift Lens - Diameter 88mm - Use Lens Gear C
• 24mm f/3.5 Tilt Shift Lens - Di ameter 79mm - Use Lens Gear B.C
• 45mm f/2.8 Tilt Shift Lens - Diameter 78mm - Use Lens Gear B or C
• 90mm f/2.8 Tilt Sh ift Lens - Diameter 73mm - Use Lens Gear B
• 24mm f/2.8 - Diameter 67mm - Use Lens Gear A
• 28mm f/1.8 - Diameter 73mm - Use Lens Gear B
• 28mm f/2.8 - Diameter 66mm - Use Lens Gear A
• 24-70mm f/2.8 L - Diameter 84mm - Use Lens Gear C
• 28-70mm f/2.8 L - Diameter 83mm - Use Lens Gear C
• 24-105mm f/4.0 L IS - Diameter 82mm - Use Lens Gear C
• 35mm f/1 .4 - Diameter 79mm - Use Lens Gear C
• 35mm f/2.0 - Diameter 67mm - Use Lens Gear A
• 50mm f/1.8 - Diameter 65mm - Use L ens Gear A
• 50mm f/1.4 - Diameter 74mm - Use Lens Gear B
• 50mm f/1.2 - Diameter