Pearl CM-127, Инструкция по эксплуатации

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4. Lens Adapter
This system is not capable of measuring most concave lenses (because the focal distance for
concave lenses is a negative value.) However, if you use the lens adapter that is available as an
accessory, you can measure some concave lenses.
How to install the lens adapter
1) Secure the center and lower stages and then remove the upper stage. (Screw in type)
2) Install the lens adapter on the upper stage. (Screw in type).
3) Secure the center and lower stages and then reinstall the upper stage with the lens adapter
installed in it.
Lens adapter
Screw in
Upper stage
Lower stage
Intermediate
stage