Should I send my 70-200mm f4 IS to canon for service?

Started 4 months ago | Questions thread
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Clover Doodle New Member • Posts: 7
Should I send my 70-200mm f4 IS to canon for service?

Hi!

I'm wondering if I should send my 70-200mm f4L IS to canon for service. I got this lens used and the auto focus mechanism is slow turning from infinity to 1 when the lens is pointed up towards the sky. I checked this mechanism manually and the lens had a really hard time moving. I looked online and a lot of other copies of this lens had similar problems. Also sometimes when I try autofocusing at a specific point the focus mechanism moves back and forth quickly. It doesn't seem to lock focus. Any thoughts?

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