A one‐film method for orienting single crystals using an oscillation film obtained with a Weissenberg camera is described. Highly precise orientation corrections are obtained by using the curvature of the nonzero lines, which is more sensitive to crystal orientation than the zero layer line curvature used in other methods. The equations used for the corrections are derived, rather than empirical, and a general equation for the shapes of the lines caused by a misoriented crystal is given.