Hello all: I would like to thank everyone that helped me to understand the Visoflex System. In the end I bought a Viso I and a focotar lens, mostly used for enlargers, but that works fine for me. The whole gadget costed 190 euros, and i can recommed it now. It is easy to use, expose and focus. And quite cheap. I leave here a picture i did for testing. I love the colours, mostly those out of focus. Thanks again. Best.