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albert kok

Member Since 02 Sep 2006
Offline Last Active Today, 12:35 AM
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Topics I've Started

Great hammerheads of Bimini

18 January 2015 - 06:19 AM

Athough the  Bahamas lack the splendid colourful reefs of the Indian Ocean and the Red Sea, they do have one big promise for the UW photographer: an abundance of big sharks. Moreover, thanks to responsible baiting of sharks it is possible to  encounter in the Bahamas almost any type of shark on a specific location. This means that the chances of actually meeting a bull, tiger or even the miraculous great hammerhead on your trip have become better and better in recent years.

Last week I had the opportunity to visit the great hammerhead on Bimini.  A shark that I had missed on my earlier trips to Tiger Beach, which is not so far from Bimini. The organiser Neil Watson Jr. and his team take very well care of the sharks as well as their visitors. Apart from some variation in the weather, diving conditions were excellent.

I'm  therefore glad to post here a link to some recent pictures of the GHH from last weeks visit.

 

https://www.flickr.c...57650228222856/


Personal Chumming Device (PCD)

18 August 2014 - 04:18 AM

Hi

There is a  never ending discussion around the topic 'chumming or not chumming'. But we all agree on the issue that chumming should interfere  as little as possible with the natural behavior of fish. The simple device I called PCD might be of help to bring fish closer to your camera, without disturbing the environment too much. I used it in the Mediterranean to attract groupers, but I think it might also work with larger predators like sharks. It could be especially useful for the individual diver in conditions when chumming on a larger scale, e.g. on a diving boat,  is not allowed or undesirable.[attachment=29126:Personal Chumming Device (PCD).jpg]Attached File  Personal Chumming Device (PCD).jpg   73.24KB   17 downloads


Ikelite D7000 housing for sale

26 May 2014 - 10:39 PM

Ikelite housing for Nikon D7000, 2 j old. Perfect condition 650 Euro, 885 US dollars.


Ikelite housings: fiber optical or electrical?

25 May 2014 - 10:13 AM

Most underwater housings equipped with fiber optic cables use the built-in flash of the camera to trigger the strobes. Ikelite DSLR housings for the Nikon SLR camera’s however use an electrical TTL circuit connected with the hot shoe that transmits  the electrical signal via a bulk-head and sync cables to their strobes.

In these housings the Nikon pop-up flash cannot be used  to trigger a fiber cable. The  housing just doesn’t allow the flash to pop-up.  Ikelite does sell an optical adapter that fires any of their strobes for housings fitted with fiber optic cables. But not for their own housings.  Sea&Sea new  MDX –D7100 housing does have this possibility for  the Nikon D7100.  And of course  the new Nauticam D7100 housing. I wonder if Ikelite  could not follow the same strategy?  And offer their clients a (future) DSLR housing that provides both optical and electrical cable bulkheads. What you  need first, is a small extension of  top of the housing  that doesn’t  block the pop-up flash anymore..


Ikelite housings: fiber optical or electrical?

25 May 2014 - 10:08 AM

Strobes fired via fiber optic cables transmit light from  the camera  built-in flash to the external strobes via a slave system. Ikelite DSLR housings for the Nikon SLR camera’s however have an electrical TTL circuit connected with the hot shoe that transmits  the electrical signal via a bulk-head and sync cables to their strobes.

In these housings the built in pop-up flash cannot be used  to trigger a fiber cable. The  housing just doesn’t allow the flash to pop-up.  Ikelite does sell an optical adapter that fires any of their strobes for housings fitted with fiber optic cables. But not for their own housings.  Sea and Sea new  MDX –D7100 housing does have this possibility for  the Nikon D7100. I wonder if Ikelite  could not follow the same strategy?  And offer their clients a (future)  DSLR housing that permits both optical and cable bulkheads. What you  need first, is a small extension of top of the housing that doesn’t  block the pop-up flash anymore..