Even though lenses are manufactured to exacting tolerances, each lens is nevertheless unique. That's why many digital cameras have a calibration function. When you calibrate your lens to your camera, you get the most precise focus possible and, as a result, the sharpest pictures possible. Leave your gear with us overnight, and we will calibrate your lenses to your specific camera body for just $40 per lens. Some cameras do not offer this feature, please check with us to confirm if calibration is possible with your camera.