This is a Samyang lens for E-mount. There are no noticeable issues to the untrained eye. There is some dust inside. This isn't a major concern, as it can happen even with dust and moisture-resistant lenses. The rear cap has scratches. Personally, I think it's better than the Nikon one. Stored in a photocatalytic dehumidifying cabinet, no smoking, no pets. This is priced at the lowest possible price, so please do not haggle.