...This is the 472-043 double condenser set for 3x4 and 4x5 negatives to be used on the DM Type C lamphouse with lenses from 135mm to 162mm...The assembly consists of two 6 condenser lenses, lens spacer, and lens housing...

...These extended lensboards are typically used for mounting 105mm to 150mm focal length enlarging lenses on Beseler 23C and 4x5 enlargers...This may be helpful when using lenses that do not themselves have an illuminated aperture scale feature...

... 4x 4 flat metal lensboard with 50mm hole and pilot light for mounting enlarging lenses with 50mm mounting thread on Beseler 23C and 4x5 enlargers...The lensboards have a rear counterbore and are typically used for 100mm - 150mm lenses...

...Like the B-22, it can handle multiple film formats from 35mm to 2x2, but its revised lamphouse design provides easier access to the condenser lenses and lamp...g lamp, double condenser lenses, heat absorbing glass, lamphouse filter drawer, under-lens filter holder, red safety filter, one #421-017 39mm lens mount, and a copy of the B-66 instruction manua...