Material Transmission Material
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
  x $165.00

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.

Additional Information:   ST-53_spec_v1-06.pdf