I’m looking to build a custom lens adapter, specifically some sort of medium format to EF mount with an optical reducer to shrink the image circle. I’m not sure where to begin with this. Is there some software I should use that would help me design the adapter and figure out what shape the glass needs to be? What resources are available for getting it made? I’m guessing 3D printing for the body, but what about the glass? Any other help is greatly appreciated. Other subs I should look in? via /r/DIY https://ift.tt/2Owiqpa
