Quote Originally Posted by baachitraka View Post
Yesterday I tried to test my Durst M 600 with a 35mm negative to enlarge of size 20x25cm.

Enlarging lens: Schneider Kreuznach @f/8 50mm.

Paper: MCP 312

Without filter: Paper speed is ISO 400 require 20.2 sec(f-stop printing).

With Grade 3 filter: Paper speed is ISO 160 require 64 sec(approximately).

Paper: Adox Vario Classic

With Grade 3 filter: Paper speed is ISO 40 require 256 sec(approximately).

Filter was placed under the lens.

Paper Developer: ECO 4812 Moersch.

Question: Is it normal to have such a long exposure times for paper.
I would suggest this neg is over exposed by at least 3 stops.