Precision-ground and polished optical glass variable triple condenser system. Enables condensers to exactly match focal length of enlarging lenses to provide maximum, even light coverage for all film formats. Eliminates the expense and bother of different condenser sets for each focal length lens. Accepts 5" square filters for variable contrast, color printing and special effects printing. Instant-access, light-tight front panel swings open to enable instant adjustment of variable condenser or insertion filters. Easy lamp access for quick changing.