ok so i don't have enough to do...anyway, i purchased a set of closeup filters for my old nikkor 50mm manual focus with the intent of reducing the cameras minimum focus distance to less than 1 ft (ikelite dome ports create a virtual focus point at 1 ft, regardless of actual subject distance - supposedly)...well, as it turns out, the addition of closeup filters really turns the 50mm into a macro and wipes out focus to infinity (not the desired end)...however, it would appear that if i went ahead and attempted to use the filtered 50mm under the dome port i would have a macro that once was set to 1 ft would not require additional focusing!!! too good to be true?

i have a perfectly good macro but this other thing could come in handy...bet we will be doing a pre-dive checkout first though;)

whatever...

As you get close to the subject your focus will change slightly with the dome port. If you really want to go this route a 55mm f2.8 micro AIS can usually be found cheap on eBay.

I use either 35mm f1.4 and 28mm f2.8 AIS lenes with a dome port with great success. The 35mm has proven to be an excellent general purpose lens underwater. Both focus to 10 inches.