Flat lens panel for De Vere 500 series enlargers, including the 504, 507, 5108, 508H, and 515. These lens boards are threaded to accept lenses with 50mm x .75 mounting thread. Lenses can be mounted directly on the lensboard without the need of a lens flange, jam nut or retaining ring. For lens mount information for specific enlargers, please refer to our DeVere Enlarger Guide website.