Response to Step wedge use for film testing?

I contact print the step wedge on 4x5 film under the enlarger. They also make step wedges that will fit 120 and 35mm. You can photograph a step wedge on a light table but if your plan is to then read in on a densitometer make sure that the image is large enough on the film. I have my test results on my web site from testing using the contact method.

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