Takahashi BRC-250 Telescope Recommendations

The BRC-250 employs non-spherical surfaces for both the primary and secondary mirrors, and when they are combined with two supplementary lenses, elimates spherical aberration, coma, and even astigmatism with a flat field. It produces a focul ration of f/5 with a 100mm 5 degree diameter image circle. It also produces an amazing 2 micron stellar image at the center of the field.