Hi, all,

I just picked up a Sony 2x TC to pair with my Canon 8-15.

Does anyone have 3D plans or a suggestion for a zoom gear?

Here is the exact housing setup:

Nauticam housing

Sony a1

Nauticam N100 to N120 35.5

Nauticam N120 30mm + 20mm Extensions

Nauticam 140 dome

Lens assembly order:

Body > Sony 2x TC > Metabones > Canon 8-15

The gear teeth would need to line up with the zoom knob on the N100 to N120 adapter.

I have the zoom gear for the 1.4x TC, but the Sony is a completely different size and in an entirely different position in the assembly.

Thanks!

chip

Hi Chip,

Are you sure the right extension for Canon+2xTC is 50mm?

I use it with 60mm extension (35mm&25mm) and Dreifish even suggested more, based on his testing (but I get occasional vignetting by sensor stabilization when I take his suggestion)...

In my files I see that for Canon+1.4x Kenko an extension of 50mm is required - your zoomgear should just fit in case you use the 50mm extension (maybe you have to remove the gear teeth wheel from the 35.5mm extension before it fits?).

I do not use a separate zoomgear, but use an extension collar for my regular Nauticam zoomgear (placed in the DIY section for 3D print). I remember faintly that someone (Gudge?) fabricated an entire zoomgear and placed it also there...

Wolfgang

Zoom gear designer mentioned here

Also its suggested that 30mm is enough extension same thread few replies in

5 hours ago, Architeuthis said:

Hi Chip,

Are you sure the right extension for Canon+2xTC is 50mm?

I use it with 60mm extension (35mm&25mm) and Dreifish even suggested more, based on his testing (but I get occasional vignetting by sensor stabilization when I take his suggestion)...

In my files I see that for Canon+1.4x Kenko an extension of 50mm is required - your zoomgear should just fit in case you use the 50mm extension (maybe you have to remove the gear teeth wheel from the 35.5mm extension before it fits?).

I do not use a separate zoomgear, but use an extension collar for my regular Nauticam zoomgear (placed in the DIY section for 3D print). I remember faintly that someone (Gudge?) fabricated an entire zoomgear and placed it also there...

Wolfgang

Hi, @Architeuthis - I saw the 60 total, but only have 50, so I gave it a try.

Even at the full wide end of 8mm, there is zero vignetting with the 140 dome with the shade attached. IQ looks good as well. The results will be from a dive.

Thanks, @Sokrates for the gear producer’s name. I’ll reach out to see what he has. I’ll also try the 30 extension to compare as well.

I did super basic tests with both the 8-15 + 2x and the WACP to compare.

Seems the 8-15 more or less matches the 130 FoV at ~10mm, followed by some similarities. The WACP with the 28-60 obviously has more reach with the 8-15 being a full 180 FoV.

In short, the 8-15 with both a 1.4x and now 2x gives wide flexibility, especially once a zoom gear is found. The 28-60 remains strong for medium wide to tight with near macro level close focus.

Between them, it should make for a very fulsome solution!

Edited 53 minutes ago53 min by ChipBPhoto