I remember learning with film cameras using 35mm. format, that if you set your shutter speed to the inverse of your focal length you should be able to handhold the camera without the use of a tripod. Now with the DX form factor does that rule still hold? Say for instance you are using a Nikon 70-200 f 2.8 VR lens and you are zoomed all the way to 200mm. (equivalent to roughly 300 mm on the old 35mm format) would you be able to handhold without motion artifact at a shutter speed of 1/300 sec. I took some images zoomed all the way in with a shutter speed of 1/600 with the VR off and the images weren't as crisp as I would have liked. I am wondering if this is motion artifact and if I would have been better served to use the VR. The subject was not moving by the way. I would post the images to show you but the subject doesn't want me to.