I'm planning to 3D print a zoom gear for the Sony 28-60mm lens. Does anyone know how many teeth the Nauticam N100 port system uses for zoom gear?

It should be 84.

Edit: Or maybe 85? The design I use has 84, but the one linked to below has 85. I can't remember what I based my design on, but it might have been from someone else's design who had potentially miscounted. Either way will likely work.

Edited Thursday at 09:40 PM4 days by Isaac Szabo

There is one here:

https://waterpixels.net/forums/topic/671-proven-3d-printed-parts-for-underwater-imaging/page/4/#findComment-15804

The gear works well, mines a bit hard to get on the lens but that's probably my printer not being calibrated properly - I might reprint it at 101% but I don't have the port so haven't got around to trying that yet.

I design all my gears to use a printed tpu rubber collar. This makes it much easier to get a snug fit with a little bit of slip. Put the rubber collar on the lens. Then slip the hard plastic gear over the collar.

Thank you all so much for the replies! I was in a bit of a rush and went ahead with my own design after @Isaac Szabo shared the tooth count. It's a single-piece gear and seems to be working well so far. I haven’t tested it underwater yet, but I’ve made similar designs before for my m4/3 lenses, and those worked great.Zoom2860.stl

Edited Friday at 10:06 PM3 days by Vitaly

On 6/12/2025 at 7:54 PM, Yorkie88 said:

There is one here:

https://waterpixels.net/forums/topic/671-proven-3d-printed-parts-for-underwater-imaging/page/4/#findComment-15804

The gear works well, mines a bit hard to get on the lens but that's probably my printer not being calibrated properly - I might reprint it at 101% but I don't have the port so haven't got around to trying that yet.

Did you print the inner ring in tpu? It has been designed to be snug but should be easy to get on because of the flexibility of the material.

13 hours ago, Robin.snapshots said:

Did you print the inner ring in tpu? It has been designed to be snug but should be easy to get on because of the flexibility of the material.

Yeah the TPU ring seems fine, I think it's just my printer that isn't quite dialled in so I couldn't get the plastic ring over the TPU ring when it was on the lens - that was the first TPU print I've done so I could have printed that in a way that made it thick or something too. I'm sure it's me or the printer that's the issue so I'll have more of a play with the settings at some point 🙂

1 hour ago, Yorkie88 said:

Yeah the TPU ring seems fine, I think it's just my printer that isn't quite dialled in so I couldn't get the plastic ring over the TPU ring when it was on the lens - that was the first TPU print I've done so I could have printed that in a way that made it thick or something too. I'm sure it's me or the printer that's the issue so I'll have more of a play with the settings at some point 🙂

TPU is usually not hard to print. Just dry it well and print slow. I usually do 75mm/s.