I have an e-mount Alpha A7iii camera body and have just bought a used A mount 70mm-200mm G SSM 2.8 FE lens. Which is the correct or best Sony adapter to buy, is iy the LA-EA4 or LA-EA3. I am using the camera for sports/action photography so good continuous focus is important.
Thank you in advance.
I have added more pics to the clear zoom page with the 18-135,18-200 and 30 macro. The clear zoom feature is so useful http://www.rtfract.com/clearzoom.html
main 6400 page http://www.rtfract.com/sonya6400.htm
I do not think the lens is fully engaged/locked in place on your A7riii. Check and make sure the the lens is completely locked position. The release button should not have play in it. The f__ is an error message indicating an issue with communication. I would also clean the contacts with a soft clean cloth. Stay away from erasures or anything abrasive that could damage the contacts.