Vivitar Automatic Tele Converter 3x-8 for M42 brand_Kawauso-Shoten and a 38-80mm zoom lens

and a 38-80mm zoom lens

bag looks unused

but the long rear flange will interfere with full-frame SLR mirrors- so keep it away from your 5D

but if you’ve got valuable gear that needs real protection from water or impact

Vivitar Automatic Tele Converter 3x-8 for M42 brand_Kawauso-Shoten and a 38-80mm zoom lensMost teleconverters only double your focal length; this one triples it. 3x is 50% better than 2x! Everyone will be impressed with your new teleconverter and you will become famous as the person with the most teleconverted lens. We cant guarantee that any of that is true, but what if it was? Wouldnt that be something? This teleconverter works on M42 lenses and bodies.