Canon or Ikelite housing for G9

I could certainly be wrong about this, but I assume that an Olympus E520 with the 14 -42 (28-84), 14-54 or 12-60 zoom would give me "decent" wide angle along with macro using just one port. Athena makes a dome port for the 14-42 that pretty much keeps the wide angle perspective on that end.

Not the best WA or macro, perhaps, but a true 28mm perspective is much better much better than the G9 without a wet lens, I think. if I am wrong, please educate me....I am not claiming to have the answer.

Although I can see the merits of it, photographically speaking, I can't see dealing with two cameras on a dive.

I could certainly be wrong about this, but I assume that an Olympus E520 with the 14 -42 (28-84), 14-54 or 12-60 zoom would give me "decent" wide angle along with macro using just one port...

I don't want this to turn into a discussion of the technical merits/limitations of specific non-G9 equipment, but the Oly lenses you mention actually prove my point:

Here is the maximum magnification of each:

14-54: Maximum image magnification = 0.26x (0.52x:35mm equivalent)

14-42: Maximum image magnification = 0.19x (0.38x)

12-60: Maximum image magnification = 0.28x (0.56x)

Ideal macro lenses can shoot 1:1 (meaning the subject is large enough in the frame to be "lifesize"). If you check the specs on a true macro lens, such as the Oly 35 or 105 macro, you see that it is:

"Maximum image magnification = 1.0x (2.0x:35mm equivalent)".

In practical terms, that means you can get a goby to fill about four times as much of the frame as with any of those three zoom lenses you mentioned.

My point is simply that, while you CAN shoot "macro" with a lens that will also shoot WA, it is - on average - going to produce far more "so-so" macro photos than if you swapped ports and used a true 1:1 macro lens. So if you really want to get "great" macro or WA shots, you're probably going to want to choose on each dive EITHER a good WA lens (like the three you mention, all of which would also be good fish lenses) OR a true macro lens (ideally with 1:1 capability like the 105 or 35, the latter also being a good fish lens) but that won't let you shoot really wide angle stuff.

You can certainly get a "Jack of all trades/master of none" lens that "sort of" lets you shoot both WA and macro, but I'm yet to see DSLR equipment - at any price - that really gives you the best of both worlds from one lens on one dive...

Your information raises some more questions in my mind, but you are right, I unintentionally sort of hijacked the thread so I guess I will save them for another time. Thanks for your input thus far.