Sealife DC100 User Manual download pdf (Page 6)

differences. Each camera type has a very unique exposure program, developed for

underwater, but also usable on land. This beats any land camera trying to also take under-

water pictures. SeaLife film cameras have a fixed exposure system. The advantage is that

it is faster, easier to use, and produces great pictures in most underwater light conditions:

Short exposure time, large aperture, fixed focus lens, flash is always on underwater.

Designed so you cannot go wrong.

SeaLife Digital Cameras, however, have a computerized exposure system that evaluates

the picture and then chooses the best combination of aperture, exposure time, “film” speed

(sensitivity), flash or no flash. SeaLife is the first camera company that has specifically

researched and developed an automatic underwater exposure system. This sounds great,

but since it gives you more options, you need to understand it to get great results. Before

you begin, you set the camera to one of 3 modes: Land, Sea, or External Flash. Sea mode

will try to get the best picture without external flash. If it is dark, sea mode will work with a

long exposure time of 1/42 second, and a large aperture of 2.8. This means you have to

hold the camera very steady, when using sea mode. You see your picture and are asked

“Delete?” By pressing the shutter button within 3 seconds again, the picture is gone. Note,

that the picture you see was taken 1/4 of a second before the actual picture. The camera

puts out a “pre-flash”, which tests the light condition, reprograms the exposure, shows you

the pre-picture and then takes the real picture. This is different in the External Flash Mode:

There is no pre-flash, the camera evaluates only the existing light, fires the internal and

external flash, processes the actual picture you took (message: “processing”), and then

shows you the actual picture with the question “Delete?”. The external flash allows a short-

er exposure time, since there is more light, (besides of capturing richer colors).

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Sealife DC100 User Manual Page 6