|Material:|| Reflective Material|
|Overall Size:|| 3.0 in. x 4.04 in. |
(76.2mm x 102.7mm)
|Image Area:|| 1.57 in. x 3.54 in.|
(40mm x 90mm)
|Step Size:|| 10mm x 10mm|
|Density Range:||0.10 to 1.6|
The ST-50 gray scale chart is a reflection object on semi-matte photographic paper. It is available either calibrated or uncalibrated. The four corner patches for the calibrated scales are within 0.02 density of each other. Each area is 10mm square.