7
I. Adjust the back focus ring for the clearest picture.
J. Adjust the zoom on the lens back to the widest picture.
K. Loosen the back focus screw.
L. Readjust the back focus for the clearest picture.
M. Tighten the back focus lock screw.
N. Repeat the previous steps, as many times as necessary, to
maintain a clear picture through the entire zoom range.
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