I have been trying to figure out why I cannot get sharp images while handholding one of my best lenses, the 70 - 200mm 2.8 VR. Especially wide open, from f2.8 to f7 or so, even at very high shutterspeeds --- like 1/3000th. Well, I guess it helps to read the manual. At some point the Active slider got turned on, which the manual tells you is only to be used when shooting from a moving vehicle. Evidently it counteracts the Vibration Reduction. So many ruined shots. At least it is not all due to bad technique, I was really starting to get frustrated. Then add a 1.7 teleconverter and there goes your depth of field, just learned about that from Moose today.
Golden evening light, cute cat trying to hide...not so great depth of field
Nikon D200, 70 - 200mm 2.8 lens with 1.7 tc at f4.8 and 1/500th