[ Photographing the seabed clarity ]

I take the example of shooting locations in the waters of Semporna, in the Sulu archipelago, Sabah, Malaysia.
Samporna beach is always calm, with small waves, a feature of this beach. In fact, virtually no wind waves caused the sea, because the location of islands in the middle of the ocean.
With these circumstances we can take pictures up to 600 meters from the edge of the beach (in this shallow area). As an illustration, at the time this picture was taken, the surface water level is only 1.5 meters or adult chest height.
to note are:

* Consideration of time
* Execution
* Additional Tools
* Lighting
* Diaphragm & speed

1. Consideration of time
shooting the morning, around 07.00 am local time, with the hope to be able to take advantage of the morning sun lighting side.

2. Execution
Done with handheld shooting, and be careful when stepping in the water to avoid camera spray. When a composition and the ideal point shooting, I set the aperture to maximize exposure to the still can be done with the handheld. I had wanted to impose use f/22 and gained speed 1 / 89 seconds, with the consideration that I could get a maximum depth of field of the boat as a foreground to infinity ..

3. Additional equipment
Warm CPL I use to manage water and a little reflection to maintain warm colors. Warm CPL played to get seabed visible in the foreground, tpi at the same time I also want to keep the light side for the house and the clouds. Finally my CPL tilted position (not perpendicular) to get the two effects mentioned above.

Speculation from my camera are:

Camera: Nikon D90
Lenses: Nikkor 18-200 VR f/3.5-5.6 G
Focal Length: 18 mm
ISO: 200
Speed: 1 / 100 sec
Apperture: f/20, 0 EV
WB: Direct Sunlight
Filter: Hoya CPL Warm
Metering: Matrix
Location: Semporna waters, in the Sulu archipelago, Sabah, Malaysia.

4. Lighting
Photography lighting conditions are perfect, because the sun is 90 degrees from the left, which is an ideal way for our CPL play optimally.

5. Diaphragm and Speed
As seen in the distance a child rowing boat, toward the house, I anticipate the directions and create a composition which I feel fit for the boat and his home, but still has a blank space on the left for the boat when it later passed. For more "secure" speed boat, my diaphragm down to f/20 and speed 1 / 100 second, which is estimated to be enough to freeze the boat.

* I say many thanks for the knowledge I got from your book ... thank you ... you JhonTefon is my inspiration.

source : Johntefon's secret of digital manipulation.