Don and I test drove our DICAPac waterproof housings for our cameras today while kayaking. Since we were in our kayaks we didn't shoot underwater, well I tried a couple of shots but it was tricky from the kayak so I focused my attention to above water shots. Don used the Canon G11 and I used my Canon 70D.
The housing for the G11 was super easy to use but the one for the 70D was very frustrating at times. Both produced a lot of vignetting so we need to be sure we push our lenses up tighter to the plexiglass lens in the housing next time. There were also focus issues but I think that is for the same reason, allowing the camera lens to slip back too far from the housing lens.
The DICAPac for the 70D was HUGE. The camera slipped around making me wonder if I had purchased a size too large. The finger openings had little gloves and operating the zoom was extremely frustrating. The finger glove for the shutter worked much better but it was still tricky fishing around for it in the mammoth case.
It was hard to keep the lens pushed up to the plexi lens of the housing so I did get some vignetting and focus issues as well but I think that will improve with practice.
More info on the DICAPacs We Used
UPDATE: The smaller WP-S5 was a tighter fit for my 70D but I couldn't use my zoom lens with it. So I'm sticking with the WP-S10.
Info from the B&H website on the: DiCAPac WP570 Waterproof Case for Canon G11
The DiCAPac WP-570 Waterproof Case will protect your digital camera when you are using it at the beach, swimming, kayaking, skiing, fishing, sailing, snorkeling or diving down to 33' (10m). This is a PVC vinyl housing with a polycarbonate UV coated port that allows access to all camera controls. It can be used with larger point & shoot digital cameras such as the Canon G11. The lens port allows the lens to extend out to 1.4" (35mm) and has an internal diameter of 2.1" (54mm). The housing meets JIS IPX8 requirements for underwater usage.