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Measuring the sample lens, step 1:

Mark the horizontal-axis line on the sample lens, disassemble the sample lenses from the frame chassis and measure the diameter of the screws or notch pins.

Position the sample lens on a mounting stage touching the top edge of the lens to the top-rear fence of the stage. Also touch the nasal side of the lens to the middle round stop and align the axis line with the printed lines on the paper beneath the PVC pad.

Fasten the lens with one of the lens clamps.

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