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Old 27-09-2016, 05:35 PM
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bojan
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Join Date: Jul 2006
Location: Mt Waverley, VIC
Posts: 6,132
Since I have Hartridge spectrometer at hand, I measured (with help of red LED) the cut-off wavelength of my Rocolax UVIRCUT filter.. 656 nm is passing through without much attenuation.
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