With the current high resolution sensors and large aperture lenses, lens calibration is critical. DSLR bodies and lenses come out of the factory with an "acceptable tolerance range".  In order to have your lens perfectly calibrated to your body, there are some specific adjustments that have be executed.  If you notice that the focus point that you are selecting is not always as sharp as it should be, you may need to have your lens calibrated to your body.  Contact us to set up a time that fits your schedule, and we'll make sure your next shoot is tack sharp.