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Rui_Guerra

Member Since 25 Jul 2006
Offline Last Active Yesterday, 09:22 AM
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#352924 10.5 vs 10/17

Posted by Rui_Guerra on 25 September 2014 - 06:18 AM

Hi all,

 

The Nikon 10,5 is one of the sharpest fisheye lens in the market, and much sharper then the Tokina 10-17. Many full frame photographers had to stop using the Tokina in high resolution cameras like the Nikon D800 (I know it's a FX lens, but you can use it for circular photos at 10 mm).

Being a fixed lens and a faster then the Tokina (f2.8 vs 3.5-4.5) it's hard to believe that it focus slower.

 

Depth of field of both wide open, will of course be slightly less in the 10,5 since you'll be using f2.8 vs 3.5 in the Tokina.

 

Cheers,




#341821 Testing lenses underwater.

Posted by Rui_Guerra on 13 January 2014 - 10:04 AM

The problem of too many lens/domes/strobes on the market will be a challenge to test everything. I've done my tests with my Subal gear and my lens in order to exclude /include some bad/good combinations and to have a good feel of distances/magnifications that each combo can deliver. I've used the test chart I've mentioned above.

 

I don't mind to where some thoughts and some personal conclusions if there are some more people that have done the same thing, so we can start some sort of database.

But of coarse that it will be just a starting point, because I believe that each photographer should do his own test with is own gear.




#341119 DNC-N Atomos Ninja 2 housing by Dive And See

Posted by Rui_Guerra on 27 December 2013 - 03:46 AM

I compared the specifications and the Dive and See is smaller and cheaper, but a little heavier.

Can anyone says if the announced weight is with or without the Ninja2/batteries inside?

 

Dive and See DNC-N:

 

  • Size 6.4 x 4.4 x 3.4 inch / 164 x 112 x 87 mm
  • Weight: 1,6 Kg in air (250 gr in fresh water)
  • Price: $1599

 

 

 

 

 

 

Nauticam NA-Ninja2:

 

  • Size: 190 x 164 x 95 mm
  • Weight: 1,09 Kg in air (neutral uw - fresh or salt water?)
  • Price: $1800

 

Dive and See have long cables (option).

Dive and See comes with the sunshade (is an option in Nauticam). This sunshade is bigger then the optional one in the Nauticam, and the buttons are inside it, I don't know if they will be more difficult to operate (the sunshade in Nauticam is smaller and the buttons are outside it).

 

 




#337500 Strobe Diffusers

Posted by Rui_Guerra on 26 September 2013 - 10:17 AM

I use another kind of difusers made for land strobes, but they are the right size for Z-240 too. It's the Lightsphere. They work very well and gives a softer edge lighting. I just secure them to the Inons with a pair of bungees (see picture).

 

See: http://www.garyfonge...erted-dome.html

 

They are also a lot cheaper!

 

Cheers,

Attached Images

  • RuiGuerra_Lightsphere_20130802_091829.jpg



#327144 New Housing "Airlock" Vacuum from Backscatter

Posted by Rui_Guerra on 04 March 2013 - 02:51 AM

Alex,

 

What is exactly the vacumm system that you have in your Subal? 

 

I also never flooded a housing in almost 20 years of underwater photography, but I believe that the more I dive the higher are the chances for a flooding due to protographer error. And sice I'm a long time Subal user,  I'm curious about the system you have in your Subal...

 

Thanks!