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albert kok

Member Since 02 Sep 2006
Offline Last Active Today, 09:15 AM
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Topics I've Started

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   16 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..


Loading your UW pictures on Nexus7

26 January 2014 - 02:51 AM

Hi, for people who don’t want to take their heavy and expensive lap top on a diving trip, a tablet could be a solution.  I bought the Nexus7, a cheap and ultralight 16 GB Android tablet that connects with Wifi (there is also a 32 GB version). To get this set up working could be a pain, but finally it will (probably)  work and satisfy your needs. If you can find the right apps!

First I downloaded a free app called Nexus Media Importer (NMI). This app allows you to stream and transfer music, video, photos and documents from a USB flash drive or card reader to your Nexus. The card reader needs to be connected with a special OTG cable to the mini USB port of the Nexus. When you import your pictures with the NMI you first select the folder or files on your card that you wish to transfer, and then select the destination folder in the tablet. Its also possible to add and name new destination folders in the directory. Another useful  app is Android file manager, that makes it  easier to search for  folders or  create subfolders  in the tablets directory.  

Both JPG and Raw  files can be transferred from your card reader to Internal storage, either individually or as a folder. But for inspecting the raw files on the Nexus screen I use another app called RawDroid.  Its also possible to transfer your pictures or folders with the ‘Share’ option  to media like Drive or Dropbox on your tablet. This could be a good option to export and download the Nexus files to your PC.  A second option is to download the app AirDroid, and use your Wifi connection either at home or at your diving location.  Finally, there is  a Photoshop app called Photoshop Touch 1.4. for   Nexus 7 that allows you to do some (I suppose modest)  photoshopping of your pictures  during your dive trip. But I think that Nexus7 might not be the best platform for picture editing. 

 

Attached File  nexus-7-sd-card-main.jpg   74.5KB   42 downloads