• | Rigid, L-shaped piece of laminated plastic 1 mm thick |
• | Millimeter markings accurate to 0.1 mm or INCHES |
• | Overall size is 105 mm x 105 mm (about 4" x 4") |
• | Gray areas have a reflectance value of approximately 18% |
• | Alternating black and white bars (1 cm) to permit measurements from grossly over- and underexposed photographs |
rigid, L-shaped piece of laminated plastic 1 mm thick|millimeter markings accurate to 0.1 mm or better|overall size is 105 mm x 105 mm (about 4" x 4")|gray areas have a reflectance value of approximately 18%|alternating black and white bars (1 cm) to permit measurements from grossly over- and underexposed photographs
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