When shooting at f1.8 or wider, your depth of field is so shallow that even a slight mis-focus can wreck your image. Many new cameras now include an "autofocus fine tuning" or "autofocus microadjustment" feature that lets you calibrate your camera's autofocus mechanism for particular lenses, correcting for any mis-alignment. LensAlign is a calibration system that takes advantage of these features to ensure that your lenses are focusing as accurately as possible. The LensAlign rig attaches to your tripod and includes test targets that you focus on to determine how much fine tuning is necessary. It also includes a mechanism for ensuring that your camera is properly oriented in relation to the calibration targets.