<p>These seamless follow focus gears have industry standard pitch 32 (module 0.8 mm).</p> <p>Suitable for Canon FD lenses (14mm, 24mm, 35mm, 55mm, 85mm, 135mm).</p> <p>Outer diameter of all gears gears is 89.6mm.</p> <p>Inner diameters are:</p> <ul> <li>61.6mm - for 14mm lens;</li> <li>71.5mm - for 24mm lens;</li> <li>65.6mm - for 35mm lens;</li> <li>74.4mm - for 55mm lens;</li> <li>80.0mm - for 85mm lens;</li> <li>71.7mm - for 135mm lens.</li> </ul> <p>Width is 10mm.</p> <p>Made of aviation grade quality aluminium alloy.</p> <p>Secured by 3 set screws (installed) with an allen key (included for each gear).</p> <p></p>