Does anyone have experience to report with Onderwaterhuis.NL Flip Adapters? I am in particular interested in [1] to mount a Nauticam CMC-1 and a weaker Inon diopter on. I am currently using a howshot swing adapter [2], but I'm thinking this will introduce more distance between the front of the port and the CMC-1

than is ideal. It's also only a single lens holder. Other suggestions that would work on the 120mm diameter Olympus flat port welcome. I think the AOI [3] is probably an option, although its more expensive.

[1] https://www.uwcamerastore.com/onderwaterhuis-nl-flip-adapter-pro-duo-67mm-for-olympus-pen

[2] https://www.divervision.com/collections/wet-lens-mounts-and-holders/products/howshot-m67-mount-base-120p-for-olympus-ppo-ep01-flat-port-rm67-120p

[3] https://www.uwcamerastore.com/aoi-m67-flip-adapter-for-olympus-ppo-ep-01-ports

I use a flip adapter from onderwaterhuis for my subal housing. I often use it with the double flip (smc and mfo)

They are 3d printed, the ring that the lens screws in is aluminium and I believe it is glued in to the printed part.

I use it for at least 5 years now, it works nice. Once fitted on the port it feels sturdy, For travel I take it off the port and store it in a little box, as it does not feel too strong on its own.

the part where the 2 halves are screwed together on the port, is the least good part. When you over tighten the screw, the 3d printed plastic can snap. I use a little stainless steel bolt, washer and nut as mine snapped a few years ago. This sollution works very well.

This flip (at least the one for the subal), allows the screwed in lens to be flipped allmost onto the port, when using longer macro ports. This is really nice, as it doesnt make the housing very nose heavy and allows for strobe positioning pretty close to the port.

I attached a photo, only 1 flip installed at the moment for local diving.

Hope this helps.

Hi @RobinD

It's really not a nice construction. I'll never trust such a 3d printed part. Not with one or two expensive lenses.

You wrote that you are using this part since 5 years... how many dives in salt water ?

hi @CaolIla

Im not sure how many dives the flip has done. If I have to guess, around 100-150? The printed parts dont seem to age / get worse over time. That said I'm sure an aluminium construction is stronger.

I have one of the printed ones for my CMC-1 lens for 8 years now, also some 100-150 dives. It has the perfect form to hold the the protuding backside of the nauticam lenses close to the port-window. The close mechanism (click to prevent the adapter flipping open) was very stiff and after many pulls underwater the inner ring got loose and I had to reglue it. This happed once. After I flattened the protusion of the locking mechanism, that''s no issue any more. I was told they use epoxyglue. Seawater does not affect epoxy-glue, sunlight does but wont reach the glued surface anyhow.