Amazon calculates a product's star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
Bought that lens from falcon electronics, the box arrived without Sony seal on the box, the serial number and barcode is removed from the box as well and hand written on white sticker!! The back lens cap has scratches. I believe this should be mentioned before selling the item as new