Takahashi optical tube assemblies: fluorite and ED doublet and triplet apochromatic refractors, Mewlon Dall-Kirkham Cassegrains and Epsilon hyperbolic astrographs. Focal lengths run from 255 mm for wide-field imaging to 1100 mm and beyond for planetary and small deep-sky work, and every tube pairs with a published flattener, reducer or extender.
