Updated Aug 1/2017
DataColor Spyder LensCal - no longer available
SpyderLensCal™ provides a fast, reliable method of measuring the focus performance on your camera and lens combinations. It allows photographers to obtain razor-sharp focusing or check to see that their lenses are working at their peak performance. This device is compact, lightweight and durable, with integrated level and tri-pod mount.
Find Color Charts and Light Meters here.