PRPATC3A033

PAT-C3-A033

Pret a Tourner

Verify the back focus of your camera's spherical lens with this Focus Sharpness 5 Spherical Lens Test Magnetic Calibration Chart from Pret a Tourner. The portable magnetic calibration chart features a star-shaped Siemens target with 5 angle rays and very high-definition printing on a matte, antireflection-coated flexible plate to facilitate checking the back focal length on any spherical photo, cinema, or video lens.