Quote Originally Posted by Cymen View Post
What is the difference between using a dichroic head with under the lens filters versus a dichroic color head with the built-in filters? I assumed dichroic head meant color dichroic head and thus brought an enlarger that is so named yet came with an empty box where the color filters are in the color head version.

Am I missing only a slight convenience by not having built-in color filters? Or is there more to it? I have seen this discussed in terms of condenser or cold head with under lens filters versus diffusion with built-in filters but not the case where both heads have diffusion light sources.
Putting a filter in the light path between the lens and the paper opens up the possibility of degrading image quality unless the filters are perfectly clean and free of any scratches. Personally I would never put a filter under the lens.