The 1c requires the extension tube labeled DOORX to be screwed into the end of any 50mm enlarging lens. The parallelogram arms controlling head height is attached 1/3 up the column. The assembly is secured with a metal pin through a column opening. I easily make 8x12 inch prints.
I have the multi-grade under the lens holder attached to my 1c. The filter holder is glued to a wood spacer glued to the metal cylinder which links the two lower parallelogram arms. I place 3 inch by 3 inch filters on top of the filter opening.
I believe you can remove the red/orange filter in the under lens swing-out filter. Place flat contrast filters on top of the glassless circular frame.
Last edited by Richard Jepsen; 01-22-2012 at 02:29 PM. Click to view previous post history.