| Replacement 6½"diameter Heat Absorbing Glass for the Beseler 45M condenser lamphouse. It is simply placed on top of the spacer ring above the condenser set. Heat absorbing glass eliminates much of the infrared radiation from the light produced by the enlarging lamp, thus helping to protect the negative and any filters from heat damage and minimizing negative "popping" which affects focus. It is particularly important because the Beseler lamphouse uses the PH212 150W enlarging lamp and therefore generates more heat than enlargers using only a 75W lamp. |
