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Wider option for A7RII

A7R II wide angle fisheye Sony Nauticam

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#21 benignor

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Posted 15 June 2019 - 05:47 AM

The fish eyes work fine with the 140mm dome, you can also use the ultra compact little Zen 100mm dome.  You would need to get recommendations on the extensions to use probably from Phil as the combination is not listed in Nauticam's port chart, also whether to use a N85 or N120 port.  You would probably only want the huge 230mm dome if you were doing lots of over/unders.

 

Based on the Canon port chart the Canon 8-15 needs 20mm more extension than the Tokina 10-17.  Based on the Sony N85 port charts the Tokina 10-17 plus metabones needs a 50mm n85-N120 adapter with the metabones, so it follows that the Canon 8-15 would need 20mm more which is a 70mm n85-N120 adapter - I would ask to confirm that.    You would also need a recommendation for a zoom gear.

Thank you, Chris! Over/unders are not a top priority for me, so I'll go with the 140.



#22 Balage_diver

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Posted 17 June 2019 - 01:06 AM

Everybody, 

 

Thoughts on what size dome to pair with the 8-15 on this system? I am told that I have a choice of 140 or 230?

 

Thank you all again,

Hello

 

I used  140 mm.   But if you would like to use it in 8 mm , The cover would be remove.

Reg.

Balazs


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#23 benignor

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Posted Yesterday, 05:37 PM

Hi, everybody. In case this thread is useful to somebody else, I thought I'd report back. I went with the Canon 8-15 via Metabones and the Zen 100mm port. As several of you stated, this combo worked beautifully. I did not notice any difference in autofocus performance compared to a native lens, which was my main concern with this option. Optically, the Canon looks fantastic to my eye.

 

Also as expected, over/under shots are a challenge with this setup (I did try, however). Now I'm considering investing in a large-ish dome to try to get into splits. The difference between the 170 mm and the 230 mm is over $1K. My next question is, does the difference between those two justify the price tag?

 

Thank you all again!

 

P.S.:HOW DO I POST SOME PICS?



#24 TimG

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Posted Yesterday, 09:20 PM

Hi, everybody. In case this thread is useful to somebody else, I thought I'd report back. I went with the Canon 8-15 via Metabones and the Zen 100mm port. As several of you stated, this combo worked beautifully. I did not notice any difference in autofocus performance compared to a native lens, which was my main concern with this option. Optically, the Canon looks fantastic to my eye.
 
Also as expected, over/under shots are a challenge with this setup (I did try, however). Now I'm considering investing in a large-ish dome to try to get into splits. The difference between the 170 mm and the 230 mm is over $1K. My next question is, does the difference between those two justify the price tag?
 
Thank you all again!
 
P.S.:HOW DO I POST SOME PICS?


To post pictures, click on the More Reply Options button then Choose File. Navigate on your system to the image you want and select it. The image will take a few seconds to load and when it appears as a small icon click Attach This File. You can only attach one file at a time but you can attach multiple images before you click Add Reply.

On the 230 dome port, if at all possible, Id suggest you take a physical look at the size of the port before deciding. I moved to a 230 port some years ago and was actually shocked when it arrived at just how big it was - even though only 1 bigger than my Subal DPFE domeport. The 230 ports are huge. I found traveling with it tricky with European baggage allowances.

Tim
(PADI IDC Staff Instructor and former Dive Manager, KBR Lembeh Straits)
Nikon D500, Nikkors 105mm and 8-15mm, Tokina 10-17mm,  Subal housing

http://www.timsimages.uk
Latest images: http://www.shutterst...lery_id=1940957






Also tagged with one or more of these keywords: A7R II, wide angle, fisheye, Sony, Nauticam