EiscoPremium Quantitative Spectroscope, +/- 5nm Accuracy

This is essentially the same spectroscope that I used in chemistry class to observe various light bulbs and burning chemicals. I am using it to test filters to see the wavelengths of light that they allow to pass. It works as expected. I really appreciate that the nanometer scale is so accurate. I tested its accuracy with a fluorescent bulb and a green laser (indirectly). See the attached images that show the respective wavelength patterns. I took the pictures by just placing my cell phone camera over the eye hole. This spectroscope is simple to use and seems durable.

I was surprised at the scientific value of this. It's far more than a cheap toy. Looking inside at a light source, it actually displays an enumerated spectrum. It might not be calibrated but it is scientifically credible and of great educational value. I'd put this in a senior high school chemistry or physics course.

La resolución es excelente

There's a knack to using these, no doubt about that, but they work really well and allow you to see the different spectral outputs of different types of lighting, LED, fluorescent, incandescent etc., and even TVs/monitors. Sunlight is an ideal reference, and there's no safety issue here observing sunlight. You'll be able to see the difference between morning and evening sunlight too. It's possible, though tricky, to take photos through it using a phone camera, for example, showing the spectra and wavelength scale. I can even tell whether a white LED uses a 450nm or a 470nm blue chip! A 420nm laser was clearly bang on 420nm, so one end of the scale is accurately calibrated at least. Light from 660nm and 635nm LEDs appeared in the right places on the scale at the other end and were clearly distinct. Yeah, you should get one if you're interested in this sort of thing!

No se ven las líneas de absorción del espectro solar.