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Reef Ramblings...

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The New Canon EF 11-24mm f/4L USM Underwater


2015-05-29



The new Canon EF 11-24mm f/4 L USM is an incredible lens, both in terms of wide angle field of view, and in how amazingly well the distortion is controlled at focal lengths this wide.  Canon has seriously upped their lens design game, and some of my favorite optics from any manufacturer (including Zeiss and Leica) are the 24-70 /2.8L II, 100mm /2.8L IS, and 8-15 /4.  Is the 11-24 good enough to make that list?


Read the results and see the test images from our in-water test here.


 

All About Strobes


2017-04-13

So many choices, so many technical words; what really is important in underwater lighting? 


This knowledge-base article explains it all!



  • Fiber Optics

  • Electrical Sync cables

  • Specifications

  • Comparison

  • Quality of Light Comparison

  • Guide Number

  • Angle-of-Coverage

  •  Recycle Time

  • Color Temperature

  • Diffusers

  • Syncing

  • TTL vs. Manual


Elly Wray's article "All About Strobes" explains it all with jargon-free explanations and example imagery.


 

All About Flash Triggers


2017-04-13


















You may have heard the term "flash trigger", but you may not understand these things.  You may even have seen one and it seems to be nothing more than a little black (gray) do-nothing box.  That's ok.  We explain more than a few things about these devices.



  • What is a “Flash Trigger” and why would I want one?

  • Benefits

  • Limitations

  • Making the switch

  • Compatibility

  • Which cameras benefit


It is all explained in our knowledgebase article "What is a 'Flash Trigger' and why would I want one?"

One, Two, Three, THREE Close-Up Lenses in One !


2016-12-13

The new Saga Trio is three close-up lenses in one.  Some might count it as four lenses in one.




The Saga Trio contains two close-up lenses (diopters) in a sealed unit.  Two easy to use levers allow you to select just the right amount of 'power' you need in just a second or two.  One lever operates a +5 diopter lens, the other operates a +10 diopter lens.  This innovative device allows you instantly to select any one of four combinations of close-up lens strength.



  • 0 power (no close-up lens)

  • +5 diopter

  • +10 diopter

  • +15 diopter.


See the Saga Trio here.

A Guide to Nikon DX Lenses


2013-02-01

Confused? Lost? Overwhelmed with lens choices?


Our photographers travel the world shooting in all types of underwater environments and share with you the knowledge you need to choose the proper lens for the job.



  • Macro

  • Fisheye

  • Super Wide Rectilinear

  • Mid-range Zoom

  • Specialty Lenses


In the Nikon DX Mount Lens Choice Guide we explain the choices and provide sample images for each type of lens.

Canon 8-15 /4L Fisheye Test Shots


2011-08-26

Moments after our friendly UPS driver Ron dropped the package on our door step we were taking measurements and cutting metal to get this impressive new lens in the water!


dp-100-nc
Our goals were to sort out whether or not this lens is a good choice for close-up wide angle shooting with a small dome, and to get an idea of how its performance stacks up when compared to the popular Tokina 10-17 Fisheye Zoom. The complete writeup, along with sample images, is available here.

In short, we are impressed. The 8-15 has less purple fringing and is sharper in the corners than the Tokina lens. Its AF system is very fast, and very accurate. This is a great addition to the arsenal of a Canon user.

New versions of our popular Zen DP-100 4 Optically Coated Glass Fisheye Dome Port are being constructed with integrated spacers to support this lens.

DP-100-AC for Aquatica
DP-100-HC for Hugyfot
DP-100-NC for Nauticam
DP-100-SC for Sea & Sea

Owners of DP-100-S3 or DP-100-S4 for Subal housings can use a 20mm Subal Extension Ring to support 8-15 in those ports.

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