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 0.10 to 4.0
  x $140.00

This target conforms to International Standard ISO 21550, "Electronic Scanners for Photographic Images - Dynamic Range Measurement".

The ST-53-1 has 0.1 to 4.0 Optical Densities which are appropriate for imaging media associated with direct visual viewing situations such as photographic slides or paper prints.

Additional Information:  ST-53_spec_v1-06.pdf