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Member Since 05 Oct 2009
Offline Last Active Dec 31 2013 06:37 AM

Posts I've Made

In Topic: Sony 10-18 f4 e-mount lens

11 April 2013 - 07:37 PM

That looks very very nice! Thanks a lot for that!

In Topic: Sony 10-18 f4 e-mount lens

06 April 2013 - 12:39 AM

There are a few photos from the port testing here:
Like all other super wide rectilinear lenses in this focal length range, corner sharpness will be a challenge if used wide open.  This can be managed by stopping down, and working in the 11-12mm range instead of full wide.

Hi Ryan,

Thanks a lot for that. Those are pictures from Edward Lai from Nauticam. I saw those too. However, he talks about a pre production port, but the post was from early February. I was just wondering if there had been any evolution.


In Topic: Which regs do you use?

07 March 2013 - 05:14 AM

Apeks, HOG or Hollis! You can't go wrong with those brands!

What is the best second stage for very cold diving?:
I need to upgrade my regulator to minimize the risk of free flow in very cold (fresh) water. I have a Conshelf/Sea first stage for which I can have an environmental seal added. One local expert suggested that regulator technology hasn't really advanced much over the past 30 years, so the best solution for the second stage would be to get an old metal US Diver one. These are supposed to have superior heat sink characteristics compared to modern second stages.
Someone else said I should stay away from old metal second stages - they are hard to find parts for, have no Venturi adjustment, and are just not as nice to breathe from as newer equipment. He said I should make sure to get a balanced second stage with heat sink features. 
Does anyone have an opinion on this question?
John McCracken

In Topic: Aquatica D7000 Housing w/2 Nikonos Bulkheads

06 February 2013 - 05:12 PM

Why was the inside exposed to fresh water?? Did the housing leak? I've been looking for a housing for my D7000.

Good question.....can you enlighten me too please?

In Topic: Olympus OM-D E-M5

11 December 2012 - 08:49 PM

I have also been testing the 8mm Panasonic fisheye with a smaller dome port than the 4.3" one. I know that the 4.3" dome is already considered a minidome. But I felt that you could get away with an even smaller one on 2x crop of M43.

I spoke with Edward from Nauticam and sent him my thoughts on what size of dome would be worth trying. This piqued his curiosity and he went to the Nauticam test tank and tried some. And by luck there is already a dome tucked away in the Nauticam arsenal that worked seemed ideal: the 3.5" for the Lumix 14mm.

I've had the chance to test this dome with the 8mm Panasonic fisheye here in Grand Cayman and it seems to perform very well. The small size of the dome allows you to move the lens closer to the subject and therefore fill more of the frame, and the smaller size of the dome helps you to light subjects right on the dome.

The smaller format of M43 also gives excellent depth of field. This has two consequence: better corner sharpness than you would get with such as small dome on larger sensors and also more depth of field, meaning distance subjects (e.g. models) remain in focus even when the main subject is very close (such as in CFWA and WAM images).

I intend to write this up in a bit more detail for Adam on the frontpage. Hopefully in the next day or so, where I can show some more of the tests and examples.


Alex are you also suggesting that the 3.5 dome could work with the Pana 8mm? Because if you look at the Nauticam website, is says that you can use the Nikon 10 f2.8 in the 3.5 and the 4.3 dome, so could the Pana 8mm also work the 3.5?