DIY Delrin Follow Focus Gears at

Go Back   DV Info Net > Special Interest Areas > Wedding / Event Videography Techniques

Wedding / Event Videography Techniques
Shooting non-repeatable events: weddings, recitals, plays, performances...

Thread Tools Search this Thread
Old November 5th, 2013, 10:35 AM   #1
Sponsor: ServoCity
Join Date: Oct 2013
Location: Winfield, Kansas
Posts: 42
DIY Delrin Follow Focus Gears

The below text is an excerpt from the DPvisualmedia blog, found here:
DIY Delrin Follow Focus Gears | DP Visual Media

This post shows a great way to use ServoCity Delrin gears to create a simple follow focus setup.

I really need to be able to change lenses quickly, I need an affordable and reliable gear that can stay on the lens at all times. I have decided to make my own:

32p Delrin gears from Servo City (32 Pitch Acetal Hub Gears (3/16" Face))

First I buy a 32p Delrin Gear from Servo City , I like the one with an 85mm outside diameter, since a larger diameter will increase your gear ratio – giving you more precision when you pull focus.

Then I take them over to my friend Ben Kailer’s shop, and bore the centers out to an inside diameter about 1mm smaller than the outside diameter of the lens. How will I fit a bigger circle into a smaller circle you ask? …… HEAT! – yes, I simply drop this “under-bored” gear ring into a pot of almost simmering water, and as the delrin heats up, it expands. I lubricate the lens with a little bit of soapy water, and the gear ring slides on without too much trouble.

After the gear ring cools to room temperature and the lubricating agent evaporates, it’s on there quite permanently. I think for me to remove these gears, I will probably have to cut them off with bolt cutters, because they are not just gonna slide off. This is exactly what I want – an inexpensive, semi-permanent gear ring for my lens, that will stay on the lens at all times, and never slide around as I’m pulling lenses from my case or putting them away. Having one of these on every lens in just one of the things I do to minimize my setup times. Please check back often for more DIY projects, and tips on how to work more efficiently!

Finished result, very reliable, and quite handsome!"
- JPandone

Here are some images:

If you have questions about how to make a follow focus like this, you can contact DPVisualMedia: Contact | DP Visual Media or e-mail

Lauren Lewis is offline   Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

Omega Broadcast
(512) 251-7778
Austin, TX

(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

(800) 238-8480
Glendale, CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Special Interest Areas > Wedding / Event Videography Techniques

Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -6. The time now is 05:00 PM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2015 The Digital Video Information Network