I purchased this to use my existing F-mount lenses with my new Nikon Z series camera, but I ended up buying new lenses and haven't used it. I purchased it on June 20, 2024, and it's only been about 10 days. I only opened it once for this shoot. I am not considering any discounts. I think it's necessary for warranty purposes, so I will include a copy of the receipt with the other product information masked. No returns accepted.