Major difference between flat and dome port with Macro?

Hi guys, I am using an Ikelite housing for my Nikon D70 and have always used a dome port for my 60mm macro lens, primarily because that the dome port came with my original housing purchase a few years ago and macro works fine with it.

I think the subjects will be enlarged if I use a flat port. Does anyone know how much of a difference there is in the picture size/subject ratio between using a dome and a flat port? Trying to figure out if I should go ahead and buy a flat port or just stick with what I have. I will be doing a ton of macro in the near future.

Thanks.

The answer is 4/3. Working distance will increase by the same amount so the highest magnification will be unchanged.

Flat ports also introduce CA but that can be dealt with in software.

Hi guys, I am using an Ikelite housing for my Nikon D70 and have always used a dome port for my 60mm macro lens, primarily because that the dome port came with my original housing purchase a few years ago and macro works fine with it.

 

I think the subjects will be enlarged if I use a flat port. Does anyone know how much of a difference there is in the picture size/subject ratio between using a dome and a flat port? Trying to figure out if I should go ahead and buy a flat port or just stick with what I have. I will be doing a ton of macro in the near future.

 

Thanks.

You have answered my question if dome port is ok for macro lens. I had been cautioned that dome are specifically designed for wide angle and may result in undesirable result with macro. If dome is ok on macro, why are we using flat port? That is, other than taking subject in confined space. Thx.