SMC Pentax-F 35-80mm f4-5.6 mount The QR system base attaches

The QR system base attaches via either 1/4" or 3/8" inner threads

The Nippon Kogaku 600mm f9 APO-Nikkor is a barrel lens (without shutter) that covers up to 11x14"

7 lens is designed to fit Minolta Maxxum and Sony Alpha SLR cameras (not mirrorless- SLR only)

glass is clean

including a large speck in the centre of the front element which you can see if you focus your eyes right (or wrong

SMC Pentax-F 35-80mm f4-5.6 mount The QR system base attachesThe SMC Pentax F 35 80mm f4 5. 6 is a compact standard zoom lens for Pentax K mount cameras. This lens will autofocus on compatible bodies, but it can be used on any K mount camera without AF, too. In good condition, with minor cosmetic wear and light internal dust.