Some readers of my previous post where I compared the Nikon D700 with Tamron 28-300 VC against the Nikon D300 with Nikkor 18-200 VR, asked for equivalent images of the Tamron on the D300. Below are four equivalent images with all combinations of the two lenses and cameras.
Nikon D300, Tamron 28-300 VC, 50mm, f/4.5, 1/8 sec, ISO 1000
Nikon D300, Nikkor 18-200 VR, 50mm, f/4.8, 1/8 sec, ISO 1000
Nikon D700, Tamron 28-300 VC, 78mm, f/7.1, 1/8 sec, ISO 2500
Nikon D700, Nikkor 18-200 VR, 75mm, f/7.1, 1/8 sec, ISO 2500
The best of the four is the D700 with the Tamron. However, when looking only at the D300 images, the Nikkor outdoes the Tamron. These images were taken on a tripod in a fixed position with constant interior lighting at night time. If you have some theory as to why this happens, please let me know.