SIGMA 50-500mm f4-6.3 APO For NIKON Mount Functionality Confirmed Used for bird photography. AF works without issue. The camera used for shooting was a Nikon D300. Selling due to upgrading to a different lens. Sample photos taken with this lens and the above camera are included in the product photos. - About the Lens - Originally, there was slight mold on the front element of the lens, so I disassembled and cleaned the front element once. At that time, I stripped two of the screws that secure the front element lens. Photos of the stripped screws are attached. The screws are tightened, but please be careful if you disassemble and clean it again. As a result of the cleaning, the original mold is gone and it is clean, but if you are looking for the same level of cleanliness as when it was brand new, you may want to refrain from purchasing. - About the Exterior - There are scratches and signs of use overall. Since I have used it as a tool, there are many paint chips. - Important Notes - I want to prevent others from making the same mistake, so I will share one important note. Regarding whether AF can be used with Nikon mirrorless cameras via the FTZ mount adapter, the conclusion is that AF does not work on mirrorless cameras. I contacted the manufacturer, but the support period had passed and updates were not possible, and I purchased a SIGMA lens update kit, but it didn't work. Please purchase this lens with the assumption that it will be used with a single-lens reflex camera. ※ Since this is an old lens, the manufacturer may not be able to repair it even if it breaks after purchase. Please consider purchasing with the understanding of this risk. - Brand: SIGMA - Model: 50-500MM F:4-6.3 APO - Mount: NIKON - Features: Functionality Confirmed, AF Working - Condition: Used - Accessories: Hood, Lens Cap Thank you for viewing. Focal Length (Wide Angle)...19-70mm Focal Length (Telephoto)...401-500mm Open F-value...2.9-4 Other Features...Lens hood included, Front lens cap included, Rear lens cap included