Follow these steps to complete accurace tests for neutral density filters:
- Select USP 2015 in the “Select testing methodology box”.
- Set the Wavelength and set the absolute value of your first neutral density filter (Target).
- Set the Tolerance to .008.
- Run the test.
- Repeat steps 2 through 4 for the other neutral density filters.
- Evolution 201
- Evolution 220
- Evolution 260 Bio