Aquatica D200 Help

Is there a benefit of using a diopter (power?) for the nikon 12-24 or 17-55/2.8 when shot through the Aquatica 8 inch dome?

Does anyone know if the minimum focus distance changes, and if so by how much?

Thanks...I'm just shifting to digital from film and have never used zoom lenses in my old Aquatica 90 housing.