Resolution 2-Cycle Log Test Chart (T-61)

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Parts are available in frequency ranges of 0.25 to 5 cy/mm, 2.5 to 50 cy/mm, and 25 to 500 cy/mm.

Equivalent cycles increase logarithmically; with two full cycles in each range. Ideally suited for scanning and micro densitometry. Each group of 2 bars and 2 spaces is progressively smaller in size.