Lens Profile Size
Please use a digital caliper and measure the lens profile view. From the front side of the lens, you can measure the Focus, Rear side for an IRIS. (It’s not possible for some wide-angle lenses, skip for the next step). Take up to 3 measurements resetting the caliper and rotating slightly the lens. Do not push the caliper too hard and don’t make large gaps too.
Lens Front Size
Follow the same measuring ways and measure the diameter of the front-facing lens (Focus/Iris). Some lenses have a textured rubber. To measure it accurately please slides the caliper up and down slightly (not too firm and lose grip). Take 3 notes and calculate the average number: Sum of all notes/number of notes. That way if you get the most accurate measurements of any lens.
Gear Widths Size
The final step is to measure the Focus/IRIS Gear width.
Out best performing and lightweight size combination is:
-IRIS 6 mm
Some Macro lenses will require wider focusing gears up to 35-50mm. (require more metal for manufacturing).
Please contact for extra-wide gear quotes.