The manual focus ring, 36 mm wide and increasing its diameter after a while, is the biggest part of this lens. Its narrower part features a distance scale, expressed in feet and meters, and the wider part is covered by fine ribbing, quite pleasing to the touch. The ring moves smoothly and is properly damped; its focus throw amounts to an angle of 320 degrees, a very high value.
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Also a big, clear DOF scale, with markings even by f/0.95, is supposed to make the focusing easier but it is the only help you get. As we've already mentioned, there are no contacts so a camera simply doesn't know that you move the focus ring and it cannot enlarge displayed images automatically. The lack of contacts is a drag and it really should be changed. Extreme parameters generate really shallow depth of field so every help in proper focusing would be more than welcome.