I often use the 70-210 F4 for portraits. I like it for the sharpness and the blur background even when not opening the aperture full or full telephoto extension. Here are a couple of pics straight from the camera without post-processing, just resized for gallery upload.
Trying to bid for one in ebay but so far not successful.. anyone selling, plese pm me.. willing to pay til S$300 for it .. if the lens is in good condition.