Woody's Diopter tips?

[Darnold9999]

Just arrived today and am planning to take it out on a three day trip on the weekend (if I can shake this cold that is). Anyone have any tips for using one of these? Will be using a Nikon D200 with the 60MM Macro lens in an Ikelite housing. Possibly the 105 as well, but that will depend on vis.

[JackConnick]

There's a sweet spot on them around f/14-16 I think. I found it wasn't that good at all above f/20.

Jack

[Darnold9999]

Good tip, I had planned to start at around f30 for depth of field.