Canon 2X Mark III EF Extender Lens Adapter Teleconverter - ERROR 01 ,FAULTY SL9

WITH CAPS

WE DO NOT HAVE A LENS TO TEST IT

WHEN ITS ON A BODY AND SHUTTER FIRES ERR 01 ON SCREEN

NOT SURE IF THIS IS DUE TO LON LENS BEING ATTACHED TO THE TELECONVERTER?

SOLD AS IS

HAPPY BIDDING