Hi all! Recently, I have realized the AF on my 50mm 1.4 seem to be stuck at times and requires me to manually turn it a little before it starting to focus. It is a 3+, almost 4 year old lens. It is quite heavily used. And for a extended period of time, I have stored it in an overly dry environment (10%-20% humidity in a dry box). Therefore, I figured that maybe the lubrication has dried up.
Has anyone encountered similar problem? Anywhere I can go to apply more lubricant or at least checkup my lens (the warranty is over)? What is the cost roughly?
Many thanks in advance!