Why is only IR cut filter printed on the cell of the ZWO UV/IR cut filter? https://astronomy-imaging-camera.com/product/1-25-uv-ir-cut-filter
Any reference on the page claims this filter blocks not only the IR but also the UV spectrum, even the wavelength curve confirms it. If it is so why not print UV/IR cut label on the cell ring? A customer claims this filter doesn't block UV range hence it is not printed.
What is the truth?
