Here's something for us S&S housing owners who are getting tired of waiting for S&S to come out with their own ext. viewfinders (on top of the custom installs Backscatter.com already provides)...
But no detail on which S&S housings it will work on...
We can install the Inon 45 finder on any of the Sea and Sea housings. So far we have done D200, 5D, and the Fuji S2 Pro. The S2 Pro needed a different adapter. Most of the older Sea and Sea housings need a different adapter as well.
We have also put it on a number of Ikelite housings. Each Ikelite is a custom install because the stock eyepiece threads into the back of the housing rather than being a press fit. Since Ikelite "taps" the threads on the back of the housing for this purpose, the start of the first thread can be anywhere. Because the rotating Inon finder needs to click stop at 0, 90, 180 and 270 degrees, those click stops must be made after the adapter piece is threaded into the back of the housing.
The new MDX housings from Sea and Sea won't be a problem. We'll be able to install the finder on those as well.
In any of the installations, the housing is left unmodified. This allows the user to remove the Inon finder and re-install the stock finder at any time.