Ikelite 8080 Dome Port Question

I'm interested in this dome port. According to Ikelite's homepage, it can be used even without WCON-08 wide conversion lens. If so, can I use Macro filter inside this dome port for macro-shot?? Can I zoom if I added this macro-filter?? Pls help!!

What filter do you need for macro?

Oh, I mean can I use any 58mm add-on lens( or macro filter or diopter or whatever it called) to my 8080 inside a dome port in a housing for shooting macro to get a magnified image??