If I pay you $10 will you just tell me what I want to hear?

Ok, so if you add too much SSD, it becomes a desensitizer right?

As for measuring, didn't they use prisms basically to spread out the light? How do they make those wedge spectrograms? It seems simple in theory, but maybe it's harder than it sounds to get an even distribution of spectral colors and with a gradual fall-off.