It's taken a while to get this zoom gear right, but I finally got a good working version. I have a Sony 7AC with the Canon 8-15 fisheye, and MC-11 adapter. I really didn't like the gear mesh with the Nauticam 100-120 adapter as the lens and adapter gears are at 90-degrees, so movement is a bit chunky, and you had to disassemble half the unit to remove the camera from housing. This zoom gear is designed to place the teeth in the same location as the 28-60mm kit lens, and thus uses the zoom knob on the housing, which has a linear mesh instead of 90-deg (lens zoom is now very smooth). It also allows you to remove the camera without taking off the dome, then the lens, to remove the camera. I expect this would probably work for any of the A7C versions using the Canon 8-15/MC-11 setup.  

If any of the Sony A7C folks would like a copy of the .step file for your own printing, I'm happy to share. Just hit me with a PM. 

 

Jim

1 hour ago, RVBldr said:

It's taken a while to get this zoom gear right, but I finally got a good working version. I have a Sony 7AC with the Canon 8-15 fisheye, and MC-11 adapter. I really didn't like the gear mesh with the Nauticam 100-120 adapter as the lens and adapter gears are at 90-degrees, so movement is a bit chunky, and you had to disassemble half the unit to remove the camera from housing. This zoom gear is designed to place the teeth in the same location as the 28-60mm kit lens, and thus uses the zoom knob on the housing, which has a linear mesh instead of 90-deg (lens zoom is now very smooth). It also allows you to remove the camera without taking off the dome, then the lens, to remove the camera. I expect this would probably work for any of the A7C versions using the Canon 8-15/MC-11 setup.  

If any of the Sony A7C folks would like a copy of the .step file for your own printing, I'm happy to share. Just hit me with a PM. 

 

Jim

 

That's very cool. I wonder if it will work with the A7Cr or A7C II? Thanks!

Edited November 9, 2024Nov 9 by humu9679
additional question

Very nice. Upload it to MakerWorld or Thingiverse.

 

I have a Nikon / Nauticam 8-15 zoom gear on MakerWorld.

 

https://makerworld.com/en/models/612332