demessieres

I just had the same problem with our observatory's TV 19mm Panoptic, and I spoke to Al Nagler at TeleVue who was very helpful and clear. You should have four lenses: two singlets (with a convex and flat surface), and two doublets (one concave and one convex surface). You also need spacing rings to go between them. None of the lenses should touch each other. On the telescope end, the concave face of that doublet should face the telescope. Then the two singlets should be in the middle, with their convex surfaces facing each other. On the eye end, the concave face of that doublet should face the eye. Clear skies!