Omega #421-065 Rec./Ext. Lensboard with 39mm Thread for C760

Recessed/Extended lens mount for mounting enlarging lenses with 39mm "Leica" thread on Omega C-760 enlargers. This mount is primarily intended to be used in the recessed position with 28mm or 35mm lenses used for enlarging subminiature formats such as Minox or 110 negatives. When used with 50mm to 90mm lenses in the extended position it can be used to increase reduction ratios, and may be required if focusing problems are encountered using the flat lensboard. 

Since these lens boards are threaded, no lens retaining ring is required. Multiple mounting slots allow you to orient the lens so that the aperture scale is facing you. The standard flat C760 lensboard is also available - please see the separate listing.