39mm x 11.5mm 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 EL-Nikkor 63mm, Rodagon 135mm, WA-Componon 60mm, Apo-Componon HM 90mm, and Componon-S 100mm, the rear element extends beyond the mounting thread far enough that it would prevent rotation of the turret. This adapter provides an 11.5mm extension, 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 shorter 6.5mm adapter is also available.

This adapter can also be used in other situations where an 11.5mm lens extension tube is required.