EISCO Premium Quantitative Spectroscope - 400-700nm Range, 5nm Accuracy - for Studying Light Sources, Measuring Wavelengths & Color Spectra

I ordered these spectroscopes for a chemistry lab and they work great! Arrived quickly and in new condition.

Works fine for the price. I think the accuracy is overstated as plus and minus 5 nm, but for my lab, determining the wavelength of the output of various light-emitting diodes, it was accurate enough. Takes a couple of minutes to become adept with it.

I needed to see if some red LED lights I had would be safe to use in my film developing lab - orthochromatic black and white film isn't sensitive to red light, but the light has to be very red - 600nm on up.Digital spectrometers are really expensive. But all I needed to see is if some lights I had were putting light out below that 600nm level.I wasn't sure if this spectrometer would be useful at all, given how cheap it was compared to all the other ones out there.You know what? It worked great for a rough estimate and let me quickly see that my red LED lights were far more wide spectrum than I thought and definitely not film safe.I highly recommend doing the mod with tinfoil to make the slit you look at the light with much thinner. (not the slit that allows the number scale to be backlit). This helps a bunch with getting a clearer view of the spectral lines. Took me about 30 seconds with some scissors, painter's tape and tinfoil.

This is not worth it, I didn't expect much having read reviews, needing to be modified and so on, however I found out why people use their cameras to see inside the device as the images of scale and numbers are illegible. I only wanted it to experience seeing the light spectrum and having that shown on a readable scale. It is junk, toy, garbage as most said, that is unless you are going to improve it by taking apart and only using a camera to read the scale.

It was excellent for demonstrating basic spectroscopy in understanding space telescopes.

It has a great design and I was able to view the spectrum of space objects. The only problem is that my little kids moved the eye piece out of the way and now its not working... Careful with the little people! Its not a toy it's an instrument

Exactly what we needed for Chemistry classroom.

I would not even use this for a classroom demo. There are numerous images of the spectrum visible, and it's not immediately obvious which one to use. (I suspect the scale is mounted upside down.) I could not always find the one aligned with the scale. The slit is far too wide to show clear lines.Frustrating and disappointing.I had better luck with one I made myself, using a grating cut from a pair of toy rainbow glasses, and a slit made from cardboard and black tape, all mounted on a paper towel tube. Of course, there was no scale, but I think it could have been roughly calibrated with red, green, and blue LEDs, which would have spec'd center wavelengths.If you must wear reading glasses, as I do, you might have a better view using them.