JTW L200 150LP/MM Grate (S/O)
This is the 150LP/MM Grate for the JTW L200 Spectroscope. It must be used with the JTW L200 to be of use, and should either be purchased with said item, or as an addition after having already purchased the Spectroscope. That said, this Grate is of superb quality, as are all of JTW's products. It is slightly worse in resolution than the standard 600LP/MM Grate, but has a drastically increased wavelength coverage, and requiring a relatively shorter exposure time.