This is an Image MC Automatic 28mm f2.8 lens for Nikon F mount. Not automatic focus, mind you, but autodiaphragm: this thing’s from the 70s or 80s, long past the time when the distinction needed to be made, but for some reason aftermarket lens companies insisted on calling things “automatic” into the autofocus era, leading to a good deal of confusion. Anyway, manual focus wide angle lens for Nikon F mount, decent quality, clean glass. Could be worth having.