Hi there, I have a canon 40 D which is 6 months old that has been getting error-01's. On the 50mm f/1.8, I get it time to time On the 18-55 f/3.5-5.6 I get it frequently I've tried all the basic routines like changing the batt's, cleaning the contacts and memory card swapping but to no avail. Does anyone else have the problem? And what should I do to remedy it. Should I send all my equipment for a checkup? Thanks!


