Congratulations and I hope you enjoy it. Before buying the 45mm macro, you might want to read some reviews, etc. I have been tempted to get one but keep reading things that make me think that for underwater use, the 14-45 might be just about as good with a closeup lens, faster focusing and far less expensive.
I don't need a macro lens above the water. If I did that might change things.
Gee, thanks for assuming I had not.
The 45mm macro has several things about it that reviewers don't like.. particularly the "focus by wire" system. The anti-shake does not work in macro (but this is true with almost all lens) I actually like the focus system and a bunch of things that make it ideal, like:
1 to 1 macro
The lens does not extend, so the port can be right next to the lens.
The front does not rotate.
It is the only lens I know of that the auto focus will work in macro.
It will also focus in video mode.... just a lot slower.
Making the lens not extend and not rotate means that there are a lot of moving parts, so suspect that effects the image quality a bit.. but at F5.6 - F 8, it is very good. The oly 50mm has better image quality than just about any macro lens, but it is huge, extends and only goes to 1 to 2....and you have to manual focus.
Closeup lens degrade image quality and really effect auto focus. As I shoot just about all my macro at around 90 mm equiv already, don't see any value in the standard zoom.