Here are a couple pictures of a French Angel fish from St. Lucia. The diver in the background is Evie Dudas, the owner of Dudas’ Diving Duds. She is also an inductee into the Woman Diver’s Hall of Fame.
These images illustrate one of the biggest challenges facing underwater photographers–water quickly filters out the longer wavelengths of light (the reds and yellows). Without the use of underwater strobes all underwater images would appear very BLUE. And they also face another issue with the use of strobes, that their terrestrial counterparts are familiar with, the rapid fall off of the light. That is, light intensity falls of with the square of the distance–while the angel fish, being 1 foot from the light source, receives sufficient light the diver, three feet from the light, only receive 1/9 of the light that fell on the fish! And as a result the background is rendered very blue.
These two images were taken 16 seconds apart. So as you might expect, the shooting metadata for these images are the same:
D200 with 12-24 @12mm
1/30 sec @ f/8 ISO 100 Comp 0
Matrix, Aperture Priority, 2 strobes normal sync
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