Based on the NIST/NBS 1010A and conforming to ANSI/ISO#2 standard,this target is ideal for verifying focus and resolution of highpowered optical systems. With direct read information, the exactcapabilities of the system will instantly be established. The values(in cycles per mm) are displayed next to 5 vertical and 5 horizontalevenly spaced bars, from 5.6 to 512 cycles per mm (89.2 µm to 0.98µm bar sizes)Overall size: 1 x 3 Image: negative image / chrome