settings, settings and the l shape

good day wetpixilians

I have just taken purchase of a 10-17mm Tonika fish-eye , running it in my Ikelite housing with 2 x z240 type 4 strobes - am after some basic settings for temperate water shots - I tried F5.6 and 1/250 with the z240 set around the .8 (7o'clock position) - Oh I have 2 x 3in arms also - do ppl have them close in pointing slightly out (strobes I mean ) or way way way out pointing straight ahead ? i am after some basic setting for both the camera and Z240's

here is a pic from the weekend

the 1st one is from the river, second from the ocean, both were at about 15 Mt's; as you can see I'm still getting the hot spots in the frame plus way too much back-scatter for my liking ,any suggestions ???? also I can see myself taking a lot of Portrait shots with the fisheye -so do ppl have their strobes in an "L" shape & again are the strobes facing forward or angled towards/away from subject

cheers and thanks in advance

In green water, it's always more difficult.

I would try angling the strobe outwards by about 20-degrees, but you must make sure that it is 3-4" (or 8-10 cm) behind the dome port. If that isn't enough, then think about moving it further away from the housing.

I tend to to put my strobes to either side of the housing in landscape format, but use an L-shape on walls and against wrecks; I do tend to use an L-shape in portrait format.

Underexposure (critical exposure) helps in green water.

Tim

Try lowering your shutter speed too. My local diving is all green water and I don't normally shoot above 1/100th (usually 1/60th). Try experimenting with different shutter speeds to see what works best for you.