Redrock Micro microLensGears Kit with 3 Lens Gears A,B,C -Color Black

The Redrock Micro microLensGears are industry-standard film pitch (0.8 mod 32) designed to gear your still photography lenses (canon, nikon, pentax, etc.) for use with the microFollowFocus.

To measure your lens' focus ring circumference, do the following: 1. download one of the ruler files here: http://www.redrockmicro.com/cartpics/ruler_foot.pdf ( US is for US 8 1/2 x 11" paper) or http://www.redrockmicro.com/cartpics/ruler_foot_a4.pdf ( A4 is for Europe paper size) IMPORTANT: Make sure to print out the ruler at 100% size, do not scale to fit. 2. Cut out the ruler and wrap around the focus ring of your lens. Make sure to wrap it around the focus ring, not other parts of the lens such as the filter 3. Record the measurement of your focus ring's circumference. The following chart will help you understand which ring to purchase:

Here are some common Canon EF (EOS) lenses and their corresponding lens gear size
Canon EF Lens -
• 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 - Diameter 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 Shift 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 Lens Gear A
• 50mm f/1.4 - Diameter 74mm - Use Lens Gear B
• 50mm f/1.2 - Diameter 86mm - Use Lens Gear C
• 50mm Macro f/2.5 - Diameter 67mm - Use Lens Gear A
• 100mm f/2.0 - Diameter 75mm - Use Lens Gear B
• 100mm Macro f/2.8 USM - Diameter 79mm - Use Lens Gear B or C
• 100mm Macro f/2.8 - Diameter 75mm - Use Lens Gear B
• 135mm f/2.0 - Diameter 76mm - Use Lens Gear B or C
• 85mm f/1.2 - Diameter 92mm - Use Lens Gear D
• 85mm f/1.8 - Diameter 75mm - Use Lens Gear B
• 70-200mm f/2.8 L - Diameter 83mm - Use Lens Gear C
• 70-200mm f/2.8 L IS - Diameter 86mm - Use Lens Gear C
• 100-400mm f/4.5-5.6 L IS - Diameter 90mm - Use Lens Gear D
• 180mm Macro f/3.5 L - Diameter 78mm - Use Lens Gear B or C
• 200mm f/2.8 L - Diameter 75mm - Use Lens Gear B