77mm > 67mm step-down adapter for Nauticam flip mount for CMC?

[pinksquiddiver]

Hello!

I shoot w/ an Olympus OMD E-M1 w/ the Nauticam housing.
I've been using the 12-50 mm lens w/ the CMC, but just purchased a port for my 60mm lens.
I'd like to be able to use the CMC w/ this lens as well but it is 67mm thread vs 77mm thread w/ the 12-50mm.

I have the 77mm Nauticam flip mount for my CMC and was wondering if anyone knows of a step ring that I could use (77 >> 67mm) to be able to use the original flip mount w/ my new port rather than having to buy a new one (they are so expensive

!! )

Thanks in advance for any suggestions!

 

[bvanant]

There are a ton of step down rings available but I don't think you will be happy. And I think we answered this question before. Just shoot the 60 macro in the 12-50 port. In my hands at least, using the step down ring didn't work, hard to keep it tight.
Bill

 

[bvanant]

I tried again last night to mount the 77 mm flip adapter to a 67 mm port. I have several step down rings but none of them could make the system tight enough to be useful. If I wanted to machine something I could probably make it work but as is not very good. YMMV of course but in my hands not quite good enough.
Bill