Any special issues when calibrating a wide angle lens?

Wide angle lenses have a more extended depth-of-field range than the standard Focus Display Ruler can normally accommodate. We would recommend that you use the Long Ruler kit with your LensAlign for wide angle lenses. This also allows you to assess focusing performance at distances much greater than the standard test distance of 25X the focal length of the lens, thus providing data that may align more closely with the conditions of actual use.

 

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