PENTAX K BAYONET APPROX. 600MM TELE LENS HOME MADE

The lens is in fairly good condition. Focus unit is made of a real lens, the middle part feels like a thick plastic tubing, front is a double element. Lens has no aperture, nor do I know what the maximum lens opening is. The barrel shows moderate signs of prior use. Shows wear at the focus ring, no dents, some dings and paint rub off. The elements are in very good condition. No scratches, no separation, no haze, no cleaning marks, no fungus on or in between the elements. The focus ring turns smooth. Comes with rear caps.

It has a Pentax bayonet-K adapter on top of a m42 screw size. The adapter sits well in place and works perfectly. I tried the M42 on a camera, but it doesn’t grab on to the screw thread. It is approx. a 600mm lens, but probably closer to 750mm. There is no clear indication of what brand this lens is.