good in low light vs sharp and crisp and fast focus

[stargost]

if chosing between two cameras (DSLR, in fact EVIL), what would be the best underwater:
-The one with highest dynamic range and great in low ligth
-The one which would be the sharpest with lots of details and also the fastest autofocus ?

Maybe I should post this on underwater-videography, but eventually, it is a choice for both video and still.

 

[EastEndDiver]

I would choose the one with fastest autofocus simple reason being you will probably be using strobes and also a focus light .If you are not using strobes then you will need better low light capabilities but you will also be losing the colors of all your subjects.

 

[Larry C]

If you do a lot of wide angle natural light shooting, especially at depth, the light sensitivity would be important. Otherwise, fastest and most consistent autofocus-the one that hunts the least in dirty water or low light would be my choice. Usually that's more of a lens choice thing but some cameras have better autofocus than others. I don't care about how many autofocus points, I usually use spot focus anyway. I just want it to hit and stay there when the subject is in focus.
Also, unlike my camera I would want one that will take the picture you ask it to, not refuse to shoot because it doesn't feel that it has perfect focus or light. I would rather have a once in a lifetime pic that's a little blurry than push the button over and over while nothing happens.