Since I am currently getting my scuba diving open water certification, I felt it was only necessary to go over underwater photography. One of the biggest activities for scuba divers is photography and it only makes sense with the vast unexplored ocean right at their fingertips. Photography underwater is a little trickier than normally but the principles are the same. Here light is the number one factor in getting a good picture. To go a little into the science that we learned in our certificaiton class, when underwater certain colors on the spectrum are absorbed more than others. For example red is the first one to go so red objects underwater won't appear so red anymore. Without proper lighting, objects and marine life only appear in shades of blue and green.
Notice in the picture below how it is lacking in color. This is because of a weak flash that is unable to uncover the vibrant colors already there.
Normal camera flashes are nowhere near powerful enough to be able to show all the colors. Most serious photographers will have a powerful flash attached and sometimes will have up to four of these flashes. Here is a picture that used professional flash attachments. Notice how the colors pop out!
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