Custom GearsIf you can't find a gear in our store or need it specially made to a certain spec, please submit a custom gear form and we'll contact you and begin working on a gear for you. Custom gears are $45. 00 and are only available in the U. S. If you don't see your lens listed, send us a message. We may already have it in our inventory. For custom gears, we need 2 measurements the width and diameter of the focus ring. Outside diameter is optional. If no