Strobe

[robstrash]

The YS50TTL uses an electrical connection and the A70 has nowhere to connect an external strobe. What you will need is a slave type strobe. One that will be triggered by your cameras internal strobe. This strobe will also need to be designed to use with a digital cameras pre flash. Ikelite and Inon both make suitable choices as does sea & sea, just not the ys50TTL (one of the ys90's will work).
I love my Inon D180. Very nice strobe. These digital camera strobes use a fiber optic cable to transmit the internal flash to the strobe trigger circuit. Here's a shot of mine showing the strobes fiber optic connection.

Thanks for the picture of what you are talking about. It makes it SOOOOOOO much easier to understand.

I just started searching UW photography, but where is the best place to buy these external strobes? You prefer a certain dealer of direct from company? Any good web sites?

Thanks

 

[lukeROB]

Thanks for the picture of what you are talking about. It makes it SOOOOOOO much easier to understand.

I just started searching UW photography, but where is the best place to buy these external strobes? You prefer a certain dealer of direct from company? Any good web sites?

Thanks

Try Yuzo in Japan, he is great.
UWDigital Cameras.com

 

[alcina]

I am not sure that Yuzo does Ikelite, only Sea & Sea and INON, I think.

For another option, check out Ryan at Underwater Camera Pros