ED APO FCD1 Series
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.
Description Temporarily Out of Stock, But More are On The Way! Explore Scientific ED80 Essential Series Air-Spaced Triplet Refractor is Available ...View full details$ 849.99
Explore Scientific ED102 Essential Series Air-Spaced Triplet APO Refractor Telescope - ES-ED10207-01Explore Scientific
Description Temporarily Out of Stock, But More are On The Way! The Explore Scientific ED102 Essential Series is Available for Back-Order Purchas...View full details$ 1,199.99
Description Temporarily Out of Stock, But More are On The Way! Estimated Restock Date is the End of July . The Explore Scientific ED127 Essential ...View full details$ 1,899.99
Original Price $ 1,899.99Current Price $ 1,399.95
Certified Pre-Owned Explore Scientific ED127 Essential Series Air-Spaced Triplet Refractor Telescope - ES-ED127075–03Explore Scientific
Description The Original Classic Explore Scientific ED127 Air-Spaced Triplet, Retooled for the Astrophotographer: New precision front cell with ...View full detailsOriginal Price $ 1,899.99Current Price $ 1,399.95
This item is currently out of stock and on backorder. Estimated restock is October 2021. Partial payment pre-orders require 5% to reserve the item....View full details$ 6,499.99Sold out