I’m interested in buying the Canon WP-DC21 but wich strobes and arms ? I need two strobes not only one, any suggestions?

and what about continuos led light?

please post some links also

David

If you go with the WP-DC21, you will need to use either a fibre-optic connector to trigger your strobes (e.g. the Inon solution - http://www.inonamerica.com/products.php?product_id=272&prodcat=1&subcat=1), or to use a solution like the Ikelite manual controller (http://www.ikelite.com/web_pages/mansensors.html).  The Inon solution basically gives you TTL if you want it, and manual control.  The Ikelite solution does not give you TTL.

If you like the Ikelite range of strobes (I have the DS125, which I am very happy with), they you might want to consider getting the Ikelite housing for the G9, which provides you TTL with Ikelite strobes, because the housing has a bulkhead connector for the camera’s hotshoe.  Also this housing allows you to use wide angle adapters if you get the short port for the housing. 

Link for Ike strobes - http://www.ikelite.com/web_pages/1strobe_index.html
Link for Ike G9 housing - http://www.ikelite.com/web_pages/5can_g7.html

As for continuous LED light, these are good for focussing / modelling lights.  An alternative here, is to get a strobe that has a modelling light built in.  The Ike DS125 and DS200 offer this, and the Inon Z240 does as well.

Good luck!

thank you for your high quality post
david

Thanks Graham, that was amazing!
I’d like to add another option that is possible for David.
Personally I am a huge fan of the Sea and Sea YS-100
strobe which is competing with the INON Z-240. You
can sync that in s-TTL via fibre optics and most local
dive shops should have that available to try the TTL
with your rig before buying the strobe.