Check pentax printed circuit board

Do not touch the golden contact points of the circuit board of emf chip when attaching and detaching the ring to your lens and camera. 2. Do not use F/64-shutter + F/57- shutter + F/64 ? shutter combination in normal shootings. ... EMF AF Confirm Pentax 645 lens to Canon EOS EF camera adapter Rear cap Product ships directly from Hong Kong via airmail and delivery may take up to 7-16 business days. We only accept PayPal. E-Check will be held until cleared. ...