Hi guys, I just bought a refurbished Nikon 24-70 f2.8 non VR version. The focus is fast and stays locked on once it hits its subject but its louder than I thought it would be for an AF-S lens. I'm wondering if anyone who owns a copy of this lens also experiences this noise? I posted a video to youtube of the lens focus so you can hear the sound. I'm only wondering because of the shorter warranty for Nikon refurbs. The link to the video is: Thanks in advance!