Hi Bruce.
Thanks for that info. I’ve had a look at the reviews you mentioned. The reviewer doesn’t mention any efforts to return the housing(s) to canon under warranty, which seems a little odd to me. I know I certainly would be taking it back to get a replacement / repair. That said, the comments appear genuine.
The point made about the diffuser is a potentially valid one, however. I’ve only seen this housing in passing (when I was talking to the guy I know who has one), and I now recall that the diffuser arrangement did strike me as looking a bit poor. He hasn’t commented to me on any problems he’s had with it, but he does use an ikelite strobe with his rig, so he probably has never used the diffuser, because he would be blocking the camera’s flash instead.
The other fairly notable aspect of this camera housing is that the port is comparitively large, and does obstruct the camera’s own flash, especially for macro shots. To be fair, most housings suffer from this problem to some extent simply because the ports have to allow the camera lens to fully extend, and that is usually a reasonably distance in front of the camera and the position of the camera’s flash.
Ultimately, I guess all u/w camera rigs are a compromise at some level. With compacts, you get the convenience of a small package, but have to sacrifice some photographic flexibility in certain circumstances. Perhaps the WP-DC8 is not as good as some other housings, in that there may be more compromises to accept.
I would be surprised if there is a pervasive design fault with the WP-DC8 that causes it to leak though. Canon must have sold hundreds, more likely thousands or tens of thousands worldwide. If all or most of them leaked, I’m sure there would be information readily available!
Another camera you might want to look at, although it is probably a small step up from the A630, especially in terms of cost, would be the Olympus SP550. I haven’t seen one in the flesh, but Olympus housings often seem to have a small edge in terms of practical features, like circular ports with threads so you can easily attach wet filters and some wet lenses, and they usually sport a shutter release lever rather than a button, which may make it easier to find that ‘half press’ position necessary to get the camera to pre-focus.
I suspect that whatever camera and housing you choose, (assuming that the housing doesn’t leak), you will soon learn how to work around any minor issues the housing presents, and you will soon be bringing home pictures that you are satisfied with and enjoy. Its very easy to get caught up in the minutiae of which camera/rig is best, but within reason, they all allow you to take photos underwater. The differences probably represent the last 10% to 20% of perfection, if you see what I mean.
Good luck!
Graham