SIGMA USB DOCK UD-01 FOR Canon. I purchased this for a telephoto lens, but I am selling it because I sold the lens. It's in beautiful condition as I stored it in its box with little use. The SIGMA USB DOCK UD-01 is an adjustment dock for CANON EF mount lenses, allowing for precise customization. - Model Name: USB DOCK UD-01 - Brand: SIGMA - Compatibility: CANON - Included items: Instruction manual, cable, warranty card (unfilled) Thank you for viewing this product from among many others. I hope it reaches someone who needs it!