There is no prism corrosion. There is dusty, look like haze, but no affect except backlit. About the lens as a bonus, it has a light torque of helicoid(Pint Ring). 50mm Lens, Genuine Strap, Genuie Fornt Lens Cap Rear Cap All you can see on the picture will be included in a set of a package.Please refer to the pictures for more details. Please check the pictures and don't hesitate to ask any questions about the item! Weekends are not available because post office is closed. All return requests must be made within 30 days of the receipt of the item. The item "TOP MINT with BONUS Lens Nikon Late FM2N NEW FM2 BLACK Film Camera From JAPAN" is in sale since Monday, January 20, 2020. This item is in the category "Cameras & Photo\Film Photography\Film Cameras". The seller is "samurai_camera*" and is located in Ota-ku. This item can be shipped worldwide.