07-456 High-Purity Aluminum Step Wedges
Only for NZ market

The 07-456 High-Purity Aluminum Step Wedges are built to US Federal Specification GG-X-635C. The 07-456 determines mAs linearity, as well as contrast vs. kVp. On these high-purity aluminum step wedges, even numbered steps are identified with lead numerals.

Available in 11 steps and 21 steps, these step wedges are used for:
  • Darkroom fog testing
  • Film and screen comparison
  • Technique chart development

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