06-18-2010, 11:22 PM
Just realized that due to the different macro working distance of the two lenses it's possible that they rendered the nearby object differently (maybe one of them rendered it as 1:2 and the other as 1:5, for example). I don't remember how close the nearby object was. I'll need to check again.
EDIT: I'm finding the "bokeh tests" difficult to perform since I don't have a tripod. However, I did find that at 2.8 the Tamron has double the light gathering ability as the Nikon. I shot a picture at ISO 400 1/100s with the Tamron and at ISO 400 1/50s with the Nikon and the pictures and histograms were identical, minus the increased vignetting on the Tamron.
EDIT: I'm finding the "bokeh tests" difficult to perform since I don't have a tripod. However, I did find that at 2.8 the Tamron has double the light gathering ability as the Nikon. I shot a picture at ISO 400 1/100s with the Tamron and at ISO 400 1/50s with the Nikon and the pictures and histograms were identical, minus the increased vignetting on the Tamron.