I received a 100mm Nikon Micro VR lens for Christmas. I noticed that when I take photos with the VR setting on, the lens makes a click noise when I slightly press the camera's button and then repeats the noise after fully depressing the button. While I have 24mm - 120mm Nikon lens with VR, this lens does not make the clicking noise. Does any one have this lens and is it normal for this action to take place? Thanks in advance for any assistance.