I metered light intensity between my LPL 670 CXL and the Durst M601 condenser. Using the same 80mm lens/f stop, head height and projected illumination diameter on the baseboard the 601 with 75w bulb was 2 1/4 stops dimmer than the LPL 75w bulb. Replacing the Durst 75w bulb with a PH212 150w bulb increases the 601 illumination to match the LPL CXL 75w light intensity. Logically the 601 reflex system is not as light efficient as enlargers with the light source directly above the condensers.
The 601 head temp was noticeably higher with the PH212 but not excessive. The glass negative carrier will keep the negative flat.
My color head issues are not worked out but it appears I need the highest light intensity available with recommended halogen lamps. The Durst compact head bounces light 45 degrees to the baseboard resulting in less illumination.
Last edited by Richard Jepsen; 01-21-2013 at 10:47 AM. Click to view previous post history.