> >You will also need a flash, and a
> >big one at that! To get good results you have to have a very large
> >flash, much larger than anything your would use on the surface.
>
> The case did come with an Ikelite flash case that had a
> mid-sized Vivitar flash in it, but it looks like it might hold a
> T-32, too. Still, not a huge flash. What sort of w-s or guide
> number would people suggest for general wide angle use?
Not sure exactly what the GN is of the flash I have is but from the
scale on the back underwater it'll do about 6m at f2.8 with ISO 100 film.
I guess that puts it around the output of a T20 on land so it probably
has GN around 20 underwater. The wide angle adapter appears to use up 1
stop of light. I've always found its power output to be ample for the
shooting I did (mostly close subjects and macro).
> I think it's safe to assume lousy visibility around here. On a
> really clear day you can see 40-60 feet. More than once I've
> found the bottom by running into it before I could see it.
Be aware that a flash will light up suspended particles :-)
> >Replace all o-rings, even if they look good.
Also make sure that you use proper O-ring grease. You need to ensure
that the grease is not water soluble! Under no circumstances should you
use Vaseline to lubricate the O-rings (as tempting as it may be).
-mark
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