Here are some images of a simple adaptation I made to my dioptrx to fit my 45 degree prism.  Click on the link above to jump to the full post!

One of the reasons I initially started shooting with the Rolleiflex was for the wonderful viewfinders with are big and bright.....

Corrective diopters are available but I have astigmatism...    But there is a solution!  Click on the post to read how....