Hi, I get very dark images while using the spectrometer, so it seems not functioning correctly.
I also upgraded DVD grating with the upgrade from Public Lab ($10) it made no difference.
I pointed the spectrometer to the CFL bulb, and this is how it looks:
Also, it pretty much same when I point it to the sky.
The slit is the default one, I also ordered a set of slits, but the 0.4mm seems to be the same as the one in use.
Any help is very welcome.