This is an superb lens. A tack sharp Xenar F/61.1/210mm and on an Prontor Press shutter which is the professional version. The shutter speeds are accurate and t/b work as they should. The glass is in excellent shape, no scratches mold or fungus. This is a light lens, great for backpacking and produces excellent results. Retaining ring and both caps are included. I will take $175.00 shipped anywhere in the US. PM me directly if interested please. Thanks, Mike.