Description: Newport model 77258 flanged XY translating lens mount, in excellent condition. Unknown lens included. The 77258 Flanged Focusing Lens Assembly is a simple lens holder frequently used for focusing the output of a collimated source onto a monochromator. It features precise 2 mm X and Y adjustments, has a large 1.38 inch (35 mm) clear aperture, and has a 1.5 Inch Series female flange for direct coupling to OrielĀ® instruments. For additional information, refer to Newport product page.