ED APO FCD1 Series

Select FDC-1 Telescopes on Sale - - 15% Off

Apochromatic (ED APO) lenses are designed to bring all the colors into focus in the same plane where as Achromatic lenses are corrected to bring two wavelengths into focus in the same plane. 

FCD-1 is manufactured by Hoya in Japan. This glass is used in the FCD-1 ED Essential and Carbon Fiber Series Apochromatic high-performance refractors.

Chromatic aberration is the phenomenon of different colors focusing at different distances from a lens. Telescope objective lenses for wide-band digital imaging in astronomy must have apochromatic correction, as the optical sensitivity of typical CCD imaging arrays can extend from the ultraviolet through the visible spectrum and into the near infrared wavelength range. Apochromatic designs require optical glasses with special dispersive properties to achieve three color crossings. Explore Scientific achieves this using costly ED (Extra-Low Dispersion) glass.

80mm Air-Spaced Triplet Essential Series ED APO Refractor Quick View
80mm Air-Spaced Triplet Essential Series ED APO Refractor $ 620.99 $ 729.99
80mm Carbon Fiber Air-Spaced Triplet ED APO Refractor Quick View
80mm Carbon Fiber Air-Spaced Triplet ED APO Refractor $ 722.99 $ 849.99
102mm  Air-Spaced Triplet ED APO Refractor Quick View
102mm Air-Spaced Triplet ED APO Refractor $ 875.99 $ 1,029.99
102mm Carbon Fiber Air-Spaced Triplet ED APO Refractor Quick View
102mm Carbon Fiber Air-Spaced Triplet ED APO Refractor $ 1,083.99 $ 1,274.99

127mm Air-Spaced Triplet ED APO Refractor Quick View
127mm Air-Spaced Triplet ED APO Refractor $ 1,317.99 $ 1,549.99