Aspheron 5.5mm

[Andrew Hamilton Watts]

Hi all, 

I am wondering if the Aspheron 5.5 wide-angle attachment will work on an early non-preset kern 10mm? I have found competing information, with some saying it will not and others saying that with the use of step-up rings, it will mount fine. I guess I am wondering if one uses step-up rings, will that effect the ability for the lens to get a good focus on the wider image? 

Any thoughts, suggestions, or experience with this is appreciated! 

 

Best, 

Andrew