Bokeh Comparison: 4 lenses shot at f/11 210mm Braunschweig Heliar, 210mm Carl Zeiss Jena Tessar, 240mm Fujinon A, 240mm APO Nikkor Note: All images were focused on the letters "Dietary Supplement" with the lens wide open, then stopped down. The Heliar exhibits focus shift: after stopping down, the point of sharp focus moved closer to the camera.