Used Lunt LS100THa ED doublet, internal double stack, w/B3400 BF, Losmandy rings + dovetail, WO 1.25" Durabright Diag. + Lunt ZoomYou won't see this come up very often, and especially not at this price. This is a complete, loaded package for H alpha solar, both for visual observing and for astrophotography. It is the Lunt LS100THa H alpha scope. It is an ED doublet and has internal double stacked pressure tuned etalons. Instead of the stock B1800 blocking filter, this one has a B3400 blocking filter, which sells for $2200 all by itself! Additionally, there are Losmandy DVR 108