Canon Community

Hi, Have just purchased a 70-200 2.8L is 11usm lens from Ebay, seller stated only 6 months old and looks in mint condition, but would like to check date of manufacture, Is it the 10 digit serial no on the box, if this is so which site do I  need to c...

I have recently purchased a  7d mk2, the problem I am having when using the 100-400 mk1 is that Iam finding it difficult to focus manual or auto even in perfect lighting conditions, have tried various settings..does the lens need to be calibrated, Ob...

I have just purchased a Canon 1.4 mk11 extender which I have attached to my 100-400 5.6 lens and 7D mk11 body. All I am able to do is set a single point focus, but when extender is removed all focusing points are again available, is this the norm for...