Dan McComb contacted me a few days ago all excited about these seamless Follow Focus gears that he'd found that were being ‘printed' on a 3D printer and he wrote an article about it and shared it with us.
He said this in his email to me:
A mechanical engineer named Sean McCurry is making 3d-printed focus gears that blow away the competition. I think your readers will be as excited as I was to discover them:
Seems he was right, they do seem pretty awesome… read more as to why Dan loves them and you might too:
One Ring to Rule Them All: Seamless Focus Gears by Mechanical Engineer Sean McCurry
From Dan McComb:
Today I’m happy to report that such bandaids for dslr lenses are no longer necessary, thanks to a mechanical engineer named Sean McCurry, who is quietly revolutionizing the follow focus gear, one perfectly printed lens gear at a time. Wait, printed? But before we get into that…
I guess you could say that I’m a focus gear whore. I feel like I’ve tried just about everything on the market in hopes of finding one that worked seamlessly (so to speak) with my set of Zeiss/Contax primes. But every one I’ve tried has left me cold.
So. Is it too much to ask to have something as perfect as the Duclos mod, for a third of the price, that without any tools, I can install myself?
Enter a mechanical engineer named Sean McCurry. I accidentally discovered his brilliant work while surfing on Ebay a few weeks ago, when I was startled to see a listing for “Seamless follow focus gears” specifically made for Contax-Zeiss primes.
I have a lens set that ranges in size from 25mm – 135mm, and Sean had each of my focal lengths covered. For $35, I took a chance and ordered one for my 50 f/1.7 prime. It arrived three or four days later, and with great curiosity I took it out of the box.
Four pages of instructions on lens fitting were included, but were unnecessary: the gear fit PERFECTLY.
I simply had to very carefully and slowly wiggle the gear on, until it seated firmly into the spot where I wanted it to stay on the focus barrel of the lens. The fit is so tight that it doesn’t slip at all, doesn’t require glue, and feels like it was made for my lens. Which, in fact, it was.
I’m not 100 percent sure how Sean is able to make such killer gears. But I’m confident it’s because he’s 3D printing them. A close examination of the gears reveals telltale patterns, strata in the plastic that are consistent with 3d printing.
One great thing about these gears is that I was able to place them at approximately the same position on 4 of my 5 lenses, so that when swapping lenses, I don’t have to adjust the focus puller position on the rails. Also, my previous gears would ride up and down the lens as they came in and out of their foam Pelican case, requiring constant readjustment, often in the middle of a shoot. These gears stay put.
|Note: it is our policy to give credit as well as deserved traffic to our news sources – so we don't repost the entire article – sorry, I know you want the juicy bits, but I feel it is only fair that their site get the traffic and besides, you just might make a new friend and find an advertiser that has something you've never seen before|
(cover photo credit: snap from Dan McComb's post)