JTW L200 1800LP/MM Grate (S/O)
This is the 1800LP/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 moderately better in resolution than the standard 600LP/MM Grate, but has a moderately reduced wavelength coverage, and requires a longer exposure time.