| Hotel & Resort Videos |
|
Meeru Special Cruise Fishing with Samsung NV24 |
VELIGANDU ISLAND, MALDIVES |
Simen's Summer on Maldives - Trailer | |
Kuredu Swimming Pool |
Video-clip honeymoon maldivas meeru island |
Reethi Beach Snorkelling with Dolphins | |
Velidhu 2008 |
Dive Point Meedhupparu Bruno's video |
Maldives Mirihi Island resort water villa | |
At the beach of Velassaru |
Soneva Gili: On one palm tree island |
Snorkelen egypte en de malediven | |
Maldives | W Retreat & Spa |
Snorkelling under our Villa |
W-Maldives |
|
|
|
| Underwater Flash - Locations |
| Home > Locations > Underwater Maldives > Underwater Photography |
The use of a flash or strobe is often regarded as the most difficult aspect of underwater photography. Some common misconceptions exist about the proper use of flash underwater, especially as it relates to wide-angle photography. Generally, the flash should be used to supplement the overall exposure and restore lost color, not as the primary light source. In situations such as the interior of caves or shipwrecks, wide-angle images can be 100% strobe light, but such situations are fairly rare. Usually, the photographer tries to create a aesthetic balance between the available sunlight and the strobe. Deep, dark or low visibility environments can make this balance more difficult, but the concept remains the same. Many modern cameras have simplified this process through various automatic exposure modes and the use of through-the-lens (TTL) metering. The increasing use of digital cameras has reduced the learning curve of underwater flash significantly, since the user can instantly review photos and make adjustments.
An added complication is the phenomenon of backscatter, where the flash reflects off dirt or plankton in the water. Even seemingly clear water contains enormous amounts of this particulate, even if it is not readily seen by the naked eye. The best technique for avoiding backscatter is positioning the strobe away from the primary plane of the camera. Ideally, this means the flash will not light up the water directly in front of the lens, but will still strike the subject. Various systems of jointed arms and attachments are used to make off-camera strobes easier to manipulate.
When using macro lenses, photographers are much more likely to use 100% strobe light for the exposure. The subject is often very close to the lens, and the available sunlight is usually not sufficient.
There have been some attempts to avoid the use of flash entirely, but these have mostly failed. In theory one could use color filters to overcome the blue-green shift, but this can be problematic. The amount of shift would vary with depth and turbidity, and there would still be a significant loss of contrast. Many digital cameras have settings that will provide color correction, but this can cause other problems. For example, an image shifted toward the "warm" part of the spectrum can create background water which appears purple or pink, and looks very unnatural. There have been some successful experiments using filters combined with the RAW image format function on some high-end digital cameras, allowing much more detailed manipulation in the digital darkroom. This approach will probably always be restricted to shallow to moderate depths, where the loss of color is less extreme. In spite of that, it can be very effective for large subjects such as shipwrecks which could not be lit effectively with any strobe.
Although digital cameras have revolutionized many aspects of underwater imaging, it is unlikely that flash will ever be eliminated completely. From an aesthetic standpoint, the flash often adds "pop" and helps to highlight the subject. Ultimately the loss of color and contrast is a pervasive optical problem that cannot always be adjusted in software such as Photoshop. |
| Hits: 57 |
|
|
Please login to post comments. |
|
|
|
