How do achromatic and apochromatic refractors differ?
Achromatic Meade refractor telescopes have a two-element lens design that greatly eliminates false color when light passes through the telescope. Apochromatic refractors also have a two-element lens design but also feature extra-low dispersion glass, which entirely eliminates color problems and aberrations. The term apochromatic literally means “color-free.” The result is a more accurate and sharper image than is possible with achromatic objective lenses.
