http://www.nikonchat.com/lens-nikkor-18-200/

Nikkor 200mm VR Zoom Lens ED-18?
I am a user of digital SLR camera … I learned many things from the past few months .. one thing that really I would like to know that there are some good settings in particular to take photos in more than 100 mm … say as 150mm or even 200 mm complete (through a lens Nikkor 18-200 VR ED), the camera I'm using is Nikon D200.Whenever longer I capture that over 100 … 150 .. 200 .. or sharpness of the images reduces a lot.I tried all focus points and tried different aperture.Are there any configuration or combination of parameters such as shutter speed + + ISO etc opening through which you can take sharp pictures of distant objects by using the maximum zoom (200 mm) or by default, as the highest zoom … sharpness also begins to decrease.
VR is great but it's hard to beat a good tripod ………. Use ISO 100 – 400 and shutter speeds as 250th or more – depending on the focal length. – Of course, everything depends upon the light shooting her in a