Hi All, I have just bought a pre-owned 24-120 f4 lens recently. How do I check whether if the VR is working well. My previous 70-200 will show some vibrating movement in the viewfinder and will have a buzzing sound when activated. There is no sound or vibrations observed with the 24-120 lens when I switched the VR to on. In fact I felt there is no prominent signs to show that the VR is activated. Is this a norm for this lens. Many thanks for your advise.