The L200 is a littrow design slit spectrograph develloped by Ken Harrison for amateur who wants build one by themself. It's a good start and more for serious spectroscopy. Different grates, adjustable slit, let's John Strachan (say a sccotish "Strarren") present his own.
Toutes mes observations spectrales, spectroscope, télescope pour percer le secret des étoiles.
Observation des astéroides, TNO et KBO
Observation diu Soleil.
All about star spectroscopy and how to do this
Asteroids, TNO and KBO
Sun observation