Nikonian72 wrote:
Your Nikon sensors are just about 24-mm wide, so at 1:1 magnification, you should capture a quarter edge-to-edge. If you see more than edge-to-edge, like yours, then you have captures just less than 1:1 mag. This is only true if you did not re-focus lens between photos.
Doug, here's a quarter 1st is just the 105mm other is with 68mm kenko tubes. The lens is an old Micro-nikkor 105mm - 1:28, 207639. I thought the 105 could take 1:1