LAST EDITED ON Aug-27-14 AT 08:31PM (MST)[p]Be really careful with the adapter you choose when going with a water proof camera.
Most of the water proof cameras out there have a sealed lens.
When you zoom, the lens does not extend from the face of the camera.
I have a pentax optio that is like this.
Lots of the adapters hold the camera too far from the scope eyepiece.
Because the lens does not extend when zoomed, you can not get rid of the black eye relief ring.
You will want to be very picky about the combination you choose.
Lots of guys are trying the olympus TG3 because its waterproof, rustproof, shock proof, ect.
But, they are having problems with the adapters for them.
Your Swaro eye relief is going to be around 17 mm
Your camera lens will need to be somewhere in that area if the lens does not extend when zooming.
Its a limited adapter market.