Rocha

Well, I can't speak for all of the marine reserves in the Philippines, but I can tell you that at least in some of them it does work. Over the past 4-5 years I did a lot of diving around Dumaguete (and some in Cebu), and the only places where I saw fish bigger than a dinner plate were inside reserves that I had to pay photo/dive fees. I can't remember the names of the reserves in Cebu, but just do some dives along the coast outside reserves and then go to places like Dawin and Apo Island, the difference is night and day...

I faced a similar decision a few weeks ago trying to decide between Nauticam and Aquatica for my D800. After looking at a couple of Aquatica products (a Canon 7D housing here at work and two 5D MIII housings that my friends have) I decided to go with Aquatica. I am used to handling Subal (had a Subal D2x for almost 10 years) and the Aquatica is of similar quality. But if you are not in a hurry, I think you should wait to hear from people that handled both housings before you make a decision.

For flat ports it is really simple, you just need to add an extension that is the same length as the TC. The length of the extensions are their numbers, extension 20 is 20mm, 30 is 30mm, etc. Remember that for the 105 you will need to add the 30 from the original extension, so either two extensions or one that is 30mm+the converter length. But my question is, why would you put a TC on the 60 if you have the 105? The 1.4 TC on the 60 would essentially make it a very slow focusing 90, which is very close in focal length to the 105, but the latter is faster to focus and probaly better IQ when compared to the 60+TC...

P.S.: With the TC you will probably lose the ability to manual focus, unless Nautical has a special focus gear for lens+TC (which I don't think they do).

According to Nauticam's system chart you can use the 60 with the "macro port 60" and the 105 with the "extension ring 30"+"macro port 60", and their focus rings should work with this configuration. But before getting the rings, make sure you want to use manual focus! I would not get separate ports, we want to minimize weight and gear when traveling.

For your second question, the extension ring for the Tokina 10-17 + TC is different than that for the 105, it will be either the 20 or 40 depending on the dome port that you chose. Check this for more detailed info:

http://www.nauticam....ystem_chart.pdf

As for your last question, given the costs for your new Nauticam housing and ports (not to mention camera and lenses), I think a new diopter holder will be the least of your worries (and I am sure they will not be the same).

Very nice shots indeed. I like the "mood" of this one you posted here.