For reliable measurement of focus performance of your camera-lens combination, the Datacolor SpyderLensCal is used. It allows photographers to ensure that the focus on the camera is same as what they require.The Datacolor SpyderLensCal is compact, lightweight, and durableIt is developed based on the modern DSLR autofocus micro-adjustment technologyThis lens calibration tool comes with tripod mount and integrated level, which makes it convenient to attach it to the cameraThe result obtained from this calibration tool is accurate and reliable