Hello.
I plan to buy my first uw camera for photo before summer. I have been reading a lot about uw photography and i starting to get a hang about what i want. There is so much to learn!
At the moment it looks like i will end up with a6500, 10-18mm and a nauticam house with sea&sea ys-d2.
But there is one part where i cant find any clear info and i feel that i am getting different answers depending on who i ask. The topic is; Sync cord vs optic cabel.
I understand the difference in how they work. One sends light from flash and the other electrical signal. One is dependent on how fast the internal flash reload and the other how fast the strobes reload?
I see this video from bluewaterdivingstore where sync cord seem to be 10x faster than optic cabel.
Now i have been told that this is not true without a ttl converter? Or flashtrigger? Difference?
I also get answers that there IS a big difference in speed even without ttl converter.
I dont know if i need this speed, but i sure know i want it.
But i am not sure how big difference it will do on my camera. Nauticam say there is no ttl converter for it atm.
I am aware of the increased risk for flooding the house witg sync cord.
Just to sum up, here are some questions i want to understand;
Is there a difference in shooting speed with sync cord vs. optical without ttl converter?
If no, why do i need a ttl converter? Is it that sync cord does not support ttl without ttl converter?
Is flashtrigger the same as ttl converter?
Why do i need sync cord for optical cables? I understand that optical already supports ttl. And speed should still be limited by internal flash?
Will the reload speed be as slow as in the youtube clip above with a6500 aswell?
I wrote this on my phone at work so im sorry if the spelling or english is bad.
Hope anyone can help me sort this out.
Thanks in advance!
I plan to buy my first uw camera for photo before summer. I have been reading a lot about uw photography and i starting to get a hang about what i want. There is so much to learn!
At the moment it looks like i will end up with a6500, 10-18mm and a nauticam house with sea&sea ys-d2.
But there is one part where i cant find any clear info and i feel that i am getting different answers depending on who i ask. The topic is; Sync cord vs optic cabel.
I understand the difference in how they work. One sends light from flash and the other electrical signal. One is dependent on how fast the internal flash reload and the other how fast the strobes reload?
I see this video from bluewaterdivingstore where sync cord seem to be 10x faster than optic cabel.
Now i have been told that this is not true without a ttl converter? Or flashtrigger? Difference?
I also get answers that there IS a big difference in speed even without ttl converter.
I dont know if i need this speed, but i sure know i want it.

I am aware of the increased risk for flooding the house witg sync cord.
Just to sum up, here are some questions i want to understand;
Is there a difference in shooting speed with sync cord vs. optical without ttl converter?
If no, why do i need a ttl converter? Is it that sync cord does not support ttl without ttl converter?
Is flashtrigger the same as ttl converter?
Why do i need sync cord for optical cables? I understand that optical already supports ttl. And speed should still be limited by internal flash?
Will the reload speed be as slow as in the youtube clip above with a6500 aswell?
I wrote this on my phone at work so im sorry if the spelling or english is bad.
Hope anyone can help me sort this out.

Thanks in advance!