Spectrum of LED light taken with DIY slit grating spectrometer
EvoGuide 50mm f4.8 apo refractor - 25micron grating located at telescope back 110mm in front of 100 l/mm grating. The slit is in one of the four threaded filter holders of a cross bar type of filter holder. It is possible to put three other slits in that unit. The grating is located 42mm in front of sensor of ZWO ASI224MC camera. There is a 40mm Plossl eyepiece in the eyepiece receptacle of the cross bar type filter 1.25" filter holder which contains the grating.
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