HI AISSA! I guess the question is whether the Canon 6D/Zeiss 2X adapter will "parfocal" with the Zeiss eyepiece. I would focus off your monitor while trying to come up with a better solution. When using the 2X with a film setup there was no particular magic about it. Just focus very carefully and compose within the viewfinder grid. Good patients would yield very nice results. sincerely, jeremy p. pantell bfa cra On Friday, August 8, 2014 4:06 PM, Aissa Dirawatun <aissa9400@xxxxxxxxx> wrote: Hello everyone, Our practice purchased a Zeiss 2x lens adapter for our FF4 (w/ Canon 6D) camera to use for ONH pictures. I'm having trouble focusing the image. I need your advice. Thank you! Aissa Dirawatun, COA Ophthalmic Photographer/Technician Virginia Retina Center 20 Rock Pointe Lane Suite 20 Warrenton, VA 20155 -- "Reading makes immigrants of us all. It takes us away from home, but more important, it finds homes for us everywhere." ~ Jean Rhys 1890-1979