I couldn't agree with Alex more... the sooner you think outside of the "10-and-2" strobe position box, the sooner you'll come home from dive trips with unique results.
Edward - The shots you posted are great! They clearly show how a snoot
can be used to illuminate the main subject, while eliminating stray background light. The background in the snoot
ed image is notably darker, making the cuttlefish stand out more.
Daniel - Great froggy shots! The shot with eggs is a stunner to me - that's been on my wishlist for YEARS now. Great find, and excellently captured. As for why I use the DS160 for snoot
ing - I use them because I have them! They're my go-to strobes for both wide angle and macro photography, so it follows that I use them for snoot
shots as well. It certainly does help that they're quick and very powerful (I was able to properly expose images shot at up to around f25 @ISO200), but with the appropriate snoot
design (highly reflective internal surfaces, concentrating the strobe's output), you should be able to get away with a FAR less powerful strobe. So, rather than retiring your snoot
to a drawer to gather dust, you might want to try tinkering with your snoot
a bit before giving up.
Here's a similar froggy image, shot with a single snoot
ed DS160 strobe:
Nikon D90, Nauticam housing, Nikon 105mm lens
1/200s, F18, ISO200