Distance 20 Ft. Tumbling E and Astigmatic Dial Chart
Tumbling E Chart with 11 lines from 20/10 to 20/200. Use at 20 Ft (6 M). Lines are 20/200, 20/100, 20/70, 20/60, 20/50, 20/30, 20/20 20/15, 20/10. Includes Astigmatic Dial and red and green bars.
Styrene chart is 11x24 inches (27.5x60cm).
Use at 20 feet/6 meters