Leica OUAGO for 90mm f4 Leica Elmar lens head on Visoflex bellows

Description

Leica OUAGO variable extension tube for M series Leica cameras using Leica S lenses in front
This tube accepts Leica screw mount lenses in front - it is designed  to give infinity focus to certain 90 mm Elmar bellows lenses when mounted directly on Visoflex housing without bellows; the resulting setup focuses as close as 3'4". Other Leica S lenses can be used and can be focused accurately with the Visoflex but I don't know to what distance ranges other lenses would focus. Other close up uses with Leica M cameras and M bellows are also possible.
The
tube functions well and should give no trouble; the focus in the only adjustment.  The tube does require more turning effort at the close focusing end than at the infinity focusing end of the rotation. There is no damage to the tube, there may be less lubrication at certain points in
the
rotation to focus.
travel