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Member Since 28 Sep 2006
Offline Last Active Aug 20 2016 02:05 PM

Posts I've Made

In Topic: FS Nauticam NA-D7100 Underwater Housing for D7100 or D7200

03 August 2016 - 02:28 PM


In Topic: Fisheye with Sony a7Rii

25 January 2016 - 02:53 AM

Yes, I had thought about the Canon lens - a flexible solution, probably better optically than some alternatives, most likely to work well with adapters as a native Canon lens, but quite expensive. 


I am looking forward to the A6000 replacement with interest, but as it stands that might still leave us with limited options for good fisheye solutions - thus our current manual focus workaround with the Tokina 10-17. If a new APS-C camera's autofocus with adapters works as well as it seems to do for the A7RII then that would be interesting. Deo claims that the Saker Falcon Lite autofocus works well with the A6000's hybrid PD/CD system at least for native Canon lenses but I haven't found many relevant independent reports and none that relate to the Tokina lens, so going that route at present would be high risk.


At least there is now a good native macro solution for Sony E-mount owners in the 90mm FE Macro.


I probably won't be at the show in February but I'm speaking at the February BSOUP meeting.



In Topic: Fisheye with Sony a7Rii

24 January 2016 - 01:30 PM

Hi Justin. Good question. This posting refers to the Sigma Fisheye/Metabones combination in some detail.


Included in the first link is Brian Smith's positive report on the combination above water with the most recent software update:


The other adapter that might be worth looking at is the new Deo Saker Falcon Lite (also marketed as Techart). Not so much information around and only available in UK on eBay:



Of course for many types of underwater fisheye use, autofocus isn't really necessary, but you would probably need a custom focus gear for MF. This is what we have done quite successfully for the A6000 with a Tokina 10-17 fisheye and mini-dome (also with a custom zoom gear). I don't think the Tokina would be a good solution for Full Frame.


What about the combination of Sony 28mm FE mount plus Nauticam WWL-1? Seems to get good reports and a lot more compact than dome solutions - although not fisheye I believe with a diagonal field of view of 130 degrees rather than 180 degrees? Phil Rudin reports his favourable experience with this combination compared with the Sony fisheye converter here:




In Topic: Macro with the A7R II & Sony FE 90mm macro

20 December 2015 - 12:06 PM

Hi Marshall. We're probably not in the right forum for this discussion, but I'll reply here anyway as I can answer some of your questions.

I can confirm that Nauticam now support a manual focus port option for APS-C Sony cameras and the Sony 90mm FE Macro lens. This is a new N85-N100 focus knob adapter with matching focus gear and N100 70mm Macro port. My daughter and I had the first example to leave the factory at the end of October courtesy of great support from UK Nauticam guru, Alex Tattersall. This worked very well using an A6000 on ~ 3 Red Sea macro dives last month. As you know the Sony 90mm Macro is a first class lens optically. I think my daughter used back button autofocus set on continuous most if not all of the time. As this wasn't primarily a macro trip and the first underwater outing for this lens, we didn't experiment with super macro underwater. In general, the autofocus appears accurate and usually successful, but slower and more inclined to hunt than say the Nikkor 105mm Macro on a Nikon D7200 DSLR. I think it will be more challenging for rapidly moving subjects on the A6000.


I have just been testing the setup out with wet lenses used in the dry in the comfort of my home. I have no reason to believe that the conclusions will be markedly different underwater at least when using a focus light.

With a SubSee +5, autofocus performance appears only a little worse than without a wet lens. Once the lens is in the focus zone, repeat pressing of the back button focus accurately and quickly fine tunes the focus point. Getting the lens into the zone is slower and occasionally misses and gives up, requiring a second or third button press attempt.

With a SubSee +10, autofocus is quite problematic. More often than not focus fails, although with perseverance lock may be achieved. Even if lock is achieved, it is usually lost with the next focus button push even though the lens is then in the zone. I wouldn't be happy using this combination on autofocus.

With a SMC-1, autofocus performance is quite similar to that with the SubSee +5 although of course depth of field is much less due to the far higher magnification.

It is interesting that the weakest and most powerful of these three autofocus fairly adequately whereas the intermediate +10 doesn't.

It should be a comfort having the manual focus option to get focus approximately correct under difficult conditions, but I suspect that the rocking method will be most effective for accurate focus with super macro using this lens and an A6000.

As for the NEX7, I have no experience but the A6000 phase detect autofocus is certainly much better than the contrast detect NEX5N that we previously used.

Hope this helps, Mark.

In Topic: Manipulating underwater subjects

11 December 2015 - 03:56 PM

Bent's thread on UWMP Group was started on 10th October Adam.