Sorry for this question if it is stupid. I was trying to find an answer for that on forum but without a lack.
I have a Meikon housing for my Sony Nex-5N camera and it has a fixed housing port so cannot be shorten. If I would change my lens to shorter one and there will be a distance about 2cm between lens and port glass what it will affect? Will it affect focusing speed or will it make a pictures blurry? Will be a different impact on flat port vs dome here?