First off I do not not believe there is a right or wrong answer to lens and port choices, it is a personal choice. I am thinking along the same lines as Ryan as far as lens choices for my EM-5 which I use in a Nauticam housing. However I decided to use the same macro port 65 for both the 60mm macro lens and the 12-50mm that came with the camera (the only two lenses I have at this point) for a few reasons:
- For traveling I only need only one port for both lenses.
- With after market zoom gear on the 12-50mm in the macro 65 port, plus a +5 Subsea the macro performance at 50mm is about the same as the 12-50 using its macro switch (at 43mm).
- Using a flip diopter holder I still have the full 12-50 zoom range when not shooting macro subjects.
- Although the cost of a subsea and flip diopter plus the zoom gear brings it up close to buying the dedicated Nauticam port for the 12-50, I still have a port to use for the excellent 60mm macro lens.
- I can easily remove the after market zoom gear from the 12-50 when I want to use it topside. Not that easy with the dedicated Nauticam zoom gear I believe. I use the 12-50 for almost all my topside shooting when I'm traveling.
- When I get the Panasonic 8mm FE and 3.5inch dome my guess is that I will be using the Macro 65 port just for the 60mm lens and the 12-50 will be largely my topside lens together with a yet to be decided fast prime lens.
- I can still use the 67mm flip diopter on the macro 65 port although I will most likely go for a more powerful diopter if I want to go really super macro.
- That just leaves me with a somewhat redundant bit of zoom gear for the 12-50
Still tossing up about wide angle options like a 7-14 zoom
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