60 Day 100% money back guarantee. This listing is for one LY-DT230-0166 industrial machine vision lens, serial number 0023381. The lens has a large front optical assembly, a C-mount camera thread, and an external adjustment ring with a locking screw. Its construction and model designation are consistent with a low-magnification telecentric-style inspection lens, but no manufacturer datasheet was available. Magnification, object-side or image-side telecentricity, field of view, working distance, supported sensor format, and optical performance have therefore not been verified. The unit has not been functionally tested, calibrated, or evaluated with a camera. Cosmetic condition is excellent overall, with light handling marks and visible dust on the exposed optics. No cracks or chips are apparent in the supplied photographs. Only the pictured lens is included; camera, caps, lighting, mounting hardware, manuals, and other accessories are not included. Approximate item dimensions are 6 x 3.5 x 3.5 inches, and item weight is 1.37 pounds. Keyword Block: ly-dt230-0166, machine vision lens, c-mount optics, industrial inspection, metrology lens, telecentric style, imaging optics