I wanted to buy a Canon telephoto lens or sigma lens which cost about $3-$4k (I don't know whether it can be considered expensive).
However, being new to photography, I totally do not know what to check (the checklist is very long and I really cannot tell the difference between a fungus and no fungus). I was wondering is it possible to pay some expert here to help me check the lens. If yes, how much should I pay?
Or is it possible to meet the seller @ canon service center where the canon people will help me check. I understand it will cost ~$100 but I think it is very worth it.
Any newbie tried this method before?