Quote Originally Posted by Donald Miller

.... the manufacturer clearly states that the purpose of the condensor set is to focus the collimated light at the nodal point of the enlarging lens. In my enlarger I have a number of different focal length condensors that are specific to different formats.
The "Nodal Point" is not the same as the Field of Focus. Even then ... I'm thinking of ray tracing ... ?

Kind of surprising that a scratch on a condenser lens should be visible ... but, to tell the truth, I can't remember ever working with a scratched condenser lens.

I have DeJur condensing system enlarger - I have to restore the Power Cable, which disintegrated over time. When I get it going I'll try out a "simulated" scratch.

Does anyone know of a source or the Old Style two prong, "Iron-Toaster" plug-in power cords?