39mm x 6.5mm Enlarger Lens Adapter for the Beseler 3-Lens Turret

Although many lenses with 39mm "Leica" mounting thread can be mounted directly on the Beseler 3-lens turret, on certain lenses, such as the Rodagon-G 50mm, WA-Componon 40mm, Rodagon 80mm, and EL-Nikkor 135mm, the rear element extends beyond the mounting thread far enough that it would prevent rotation of the turret. This adapter provides a 6.5mm extension, just enough to allow the turret to rotate while still allowing proper focusing. Simply screw the lens into the adapter, and screw the adapter onto the turret. A longer 11.5mm adapter is also available.

This adapter can also be used in other situations where a 6.5mm lens extension tube is required.