For sale is a 270mm f/5.6 Rotelar in decent condition. There is what looks like separation of the glue in the front element, this is only extends a millimeter or two into the lens and is out of the image line. Should not affect image. Otherwise the glass is clean. Shutter is a bit fugly but works well except for the 1/2 and 1 second. 1/2 is slow and 1 is sticky and barely works. Comes with a retaining ring. - $180