  We present analyses of high resolution and medium resolution spectra of early
L dwarfs. We used our latest set of model atmospheres to reproduce and analyze
the observed features. We can model the optical flux and the atomic line
profiles with the best accuracy to date. The models used to reproduce the
observations include dust condensation and dust opacities. Compared to previous
studies using older models we find that our dust treatment is much improved.
The derived parameters for the objects are well in the expected range for old
very low mass objects. This is also supported by the absence of Li in most of
the objects. For the objects showing Li we can be almost certain that those are
brown dwarfs. However, a spectral analysis in general, and this one in
particular can only very roughly determine mass and age.
