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Alison Perkins

Member Since 04 Jul 2008
Offline Last Active Yesterday, 03:36 PM

Posts I've Made

In Topic: Mounting ideas for a slave strobe?

17 December 2014 - 05:28 PM

Sounds interesting. Would be keen to see photos of setup and results if you have an interest in sharing.


If the magnet is that strong will you not have an issue pulling it off underwater?


Unfortunately magnets won't work for the aluminium tanks generally used in Mexico cave diving.

In Topic: A rivers born

16 December 2014 - 09:22 AM

Delightful - well done!


In Topic: Long exposure time/night dive/painting with light

13 December 2014 - 09:53 PM

I have done tripod-mount long exposure painting with light in a cave but there's not really much information to share. 30 sec exposure and paint away. :-)


You want to be methodical about your painting - wide beam light. Consider having a preset focus because it's a pain to focus the camera in the dark.

In Topic: Mounting ideas for a slave strobe?

13 December 2014 - 10:00 AM

Great! I look forward to seeing the results.


I'll just put this out there for consideration... I find that one of the greatest challenges of mounting strobes on the backs of cave divers is the resulting ugly "leg shadows" on the floor and walls.


It sounds like you are planning to nestle a strobe between tanks, which may be a practical way to transport strobes through the cave but may not be a functional way to get light out.

In Topic: Mounting ideas for a slave strobe?

12 December 2014 - 11:32 PM

Hi Don,


I tank-mount strobes on divers in doubles using bands of tire tubing, the same as I use on stage tanks to neatly stow regs. I've not yet been brave enough to tank-mount strobes on divers prior to passing through The Lips in Ginnie. I wish you all the best with it and I would be interested to hear how you get on. I have seen divers put my tank-mounted strobes into the ceiling and I can tell you it sure does hurt to watch!


For caves with really tricky sections (restrictions) that I want to shoot beyond, I will carry strobes into the cave in my drysuit pockets and mount them on the divers when we have passed through the restriction, removing them again for the exit. It works well but you and your models have to be patient setting up and you should plan to lose time and gas this way (and be super careful you don't trap a diver's long hose with your strobe cord routing).