Linear-spaced lines; line sizes range from 20/100 to 20/16 equivalent. Lines are labeled with 10 ft and 20 ft notations only. This chart can either be wall mounted or used in an ESV1200, ESV1500, or a Model A illuminated cabinet. Chart size is 9″ x 14″ (22.9 cm x 35.6 cm).
10 feet, 3 meters testing distance.