To start building a custom gear, we need 2 measurements - the width and diameter of the focus ring. Outside diameter (OD) is optional. If no outside diameter is specified, it will be made as a standard low profile. Low profile gears usually have between 3 and 6mm (less than 1/4") thickness for a clean, low profile gear that slides easily into your current lens case or bag.

Find lens focus ring sizecalculator

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LensFollowFocus Ring

If you've got a set of digital calipers, those are absolutely the best method of measuring. They are very precise and ensure that your gear will fit right with as few adjustments as possible. If you don't have calipers, here's a link to the same ones we use.

Our new line of HD Seamless™ Follow Focus Gears are available for custom work on request. Pricing on HD gears varies according to dimensions. If you're unfamiliar with our HD gears, they're simply made to at a finer resolution. The most noticeable difference is their flawlessly-smooth, highly professional surface finish. Otherwise they do the exact same job as standard focus gears - full functionality, a perfect fit, and high degree of customizability, just like you can always expect from us.

We highly recommend you use a digital calipers to measure. However, if you don't have access to calipers, lenses can be measured using only a paper strip. There are a few things you should know before using a paper strip though - the measurement is usually not as accurate and the gear may or may not fit as perfectly. We'll still adjust the gear if needed.

Find lens focus ring sizenikon

You can wrap this around your lens's focus ring and read it from the zero mark to find the circumference of the focus ring. You can also use this to find the width of the focus ring - the distance from front edge of focus ring to the back edge.

Camerafocus ring

On this lens, fit ring #67 fits perfectly and turns the focus ring without slipping. It fits exactly how the gear should fit, so let us know which # ring works best and we'll mail the corrected gear to you.

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If you can't find a gear for your lens, please take a moment to fill out a custom gear form. Custom gears are only available inside the US and are $45.00.

We'll include a set of fit rings you can try on the focus ring in the event your gear doesn't fit properly. There will be 10-15 numbered fit rings with slightly different inside diameters, in the same size range as the measurement you provided. Try them on the focus ring of your lens until you find one that fits tightly enough to turn the focus ring without slipping. We can make very precise adjustments based on which # ring fits best. We will adjust it and mail it free of any additional charges. It's not unusual for some little fine- tune adjustments for a perfect fit. It's well worth the time and effort to request adjustments if needed. After all, your lens is a serious investment in yourself and your work, and our gear should compliment that investment with the same degree of professionalism.

We can sometimes do custom work outside the US. To ensure our work is at the highest standard with fast turn around times, we make adjustments to any custom made gear for no additional cost and ship the replacements to you. Newly made custom gears usually require at least one adjustment. If you are outside the US, custom work does take a little bit longer because of necessary shipping time and even longer if the gear needs adjustments made. Of course, expedited world wide shipping is available at checkout. If that is acceptable, please submit a form below and we will review the gear design and begin work.