T3D Re: underwater housings

[Tom Deering <tmd@xxxxxxxxxxx>]

>My sister, who is a very strong swimmer, bought a Nikonos waterproof
>camera. Perhaps two, maybe bottom to bottom, would be a quick, but
>not cheap, way to go.

I shudder to think of what ONE would cost.  :^)

>Don't forget that the index of refraction of water is about 1.3, as
>compared to 1 for air, so that the focussing scales can't be trusted.

So the idea is to multiply the focussing scale by 1.3 to calculate the
actual focussing distance?




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