Hi Nate,
Thank you very much for your answer - I have read it in July, but did not really have time to answer. I have tried / checked steps 1 - 6… no improvement. I use a Sony a7II, an old Nikon Nikkor AIs Micro 55mm f. 2.8, a Nikon extension tube to obtain 1:1 (I believe it’s the PK13), Slimlite Plano on a repro-stand… I have not tried to shoot in the dark only with the light table, but I dobut this comes from the other soft light source I have in the room where I take the pictures.
In the meantime, I have cut out black paper that blocks the light, but this work around does not come in handy, since I bought the Digitaliza to optimize the time I need to scan.
It is a mystery and I cannot imagine that other user do not have that issue – but on the other hand I do absolutely not doubt your observations and your experience… I will continue to search for the fix and will keep the forum informed if I find a solution….
Thanks, Steph