I got a 35mm f3.5 SSC 'breechlock' Canon lens at my Camera Club auction for £1 Sterling -- other members didn't know what it was or had Canon 'Digital'EOS fit -- well-- I gave it an outing to LONDON at Christmas time in Trafalgar Square and got a good shot of the Tree from the King of Norway and church St Martins in the Fields. It was sharp -- I used f5.6 on my black AE-1.