I would like to know if anyone has had the opportunity to directly compare a 600mm Fujinon T to a 600mm Nikkor T-ED and, if so, what they found. I am interested in the resolution, contrast and color of one vs. the other, not the speed or the dimensions, weight and bulk or the size of the image circle. Thanks, in advance, for any replies regarding this. Arrggghhhhh!!! I apologize for the double post, I thought I had put it in the MF forum and, now, I cannot find a way to delete the second posting.