This is a 1.35x magnification magnifier. Diopter adjustment is possible. It has multi-coating. When used with a 35mm lens, the bright frame fills the entire field of view. With a 50mm lens, it expands to about the size of a 35mm frame. It's an old item, so there is some dirt visible around the lens. It's not very useful, so please consider purchasing it as a collector's item. We apologize, but returns are not accepted. Also, the camera in the fifth photo is not the item for sale. Thank you for looking.