I can get hold of an old colormunki photo (5 years old, but was only used twice). Do spectrometers get incorrect when they are old, or is it possible to calibrate them?
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as long as the instrument was handled properly (i.e. not dropped or otherwise physically damaged, kept in low humidity, dust-free storage conditions), it should be fine. X-Rite does offer re-certification for their i1 Pro line of spectrometers, but I think not for the ColorMunki Photo/Design (and i1 Studio).