The Diopter Thread. In: Cameras Posted October 19, 2017 On 6/23/2017 at 7:12 PM, EnzoNgu said: Hans, thanks for the suggestion. I contacted Raf and we are working on a solution. I'll post some pics when I have the adapter. Did you find a solution? I've ordered a Zeiss Digi diopter +.5 for my Isco 54 aswell! May I ask how much you got it for?