WELTBLICK 2x tele-konverter extender lens converter barlow objektiv lente duplicador (M42 thread)

• Description: very good condition. Multicoated. M42x1 thread. Adds 27mm to optical train once inserted. It has pin for "auto" old analog M42 SLR cameras. It has two screws to turn conveniently your camera or set up (you lock them once you have good position). Includes pouch. These barlows can be used in telescopes too!
• Issues: could have some vintage traces, but lenses are like new.