|Overall Size||1.38 in. x 3.39 in. - 35mm x 86mm|
|Active Image Area||20mm x 30mm|
|Number of Steps||24|
|Step Size||5mm x 5mm|
|Density Range||0.0 to 6.0|
This target conforms to International Standard ISO 21550, "Electronic Scanners for Photographic Images - Dynamic Range Measurement".
The ST-53-2 has 0 to 6.0 Optical Densities which are appropriate for intermediate imaging media such as negatives.