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Hi folks, I am seeing more and more situations where i would like to shoot bursts underwater, such as approaching schooling fishes, rapid swimming hunters, or macro. So, i am looking for advice on which setup attributes to look for in order to make it possible, i have in mind a few areas of attention: Strobe exposure control: TTL or manual I know most of you probably go manual, but having tried both, i must admit i still prefer TTL, which gets the exposure quite right in most of my experience. And when shooting actions, i doubt even further my ability to get manual exposure right. I am just wondering if the extra flashes needed for the TTL may limit the ability to shoot multiple real flashes, or limit the burst frequency. The answer might depend on the next point though. Strobe connectivity: electric or optical fibers Like many, i moved to optical fibers (got corroded electric cables twice...). It's great in terms of reliability, though it introduces a dependency on the camera's internal flash capabilities. In manual mode, you workaround it by setting the internal flash to 1/64th of it's power or something like that. When doing so, are we confident the internal flash won't be the limiting factor? So bottom line questions: are optical fibers a no-go for burst shooting? Or OK... in manual only? Which strobes? Some strobes might be more capable than others in terms of burst shooting. Right now i use two Inon Z240 type IV, would there be suitable? Would others be better? I must say i am puzzled by the userguide's recommendation to limit the number of shots, wait for the strobe to cool down, etc... Camera continuous-autofocus capabilities (underwater) Though burst mode could be used for still subjects to capture a given attitude, i foresee it mostly for fast moving subjects. Hence, there's a need for good continuous focus capability on the camera side. I am currently using an Olympus Micro 4/3 and i don't think these cameras are (yet?) fit for continuous autofocus. Before i used Nikon, and would not be against going back to this brand. So question is which of their D-SLRs would do the trick - not sure the D7000 is sufficient? Or maybe it is? Something to add: i would really prefer to avoid full frames cameras, i could cope with the budget of an APS-C D-SLR, especially if i can buy it used, but full frame would be too expensive and bulky for travel (already have to carry 2 rebreathers, for wifey and myself...). Any other criteria to consider for that setup? thanks in advance for sharing your thoughts :-) cheers Nicolas