01
Grab-and-go APO
ED80
- 80mmAperture
- f/6Focal ratio
- 480mmFocal length
A compact true apochromat that's light enough for spontaneous nights out and sharp enough to anchor an astrophotography rig.
$1,003.00
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.
ED APO FCD1 Series
Four apertures. Zero color.
Air-spaced triplet apochromats built with genuine HOYA FCD1 extra-low dispersion glass and EMD coatings, for sharp, color-free views and imaging.
01
02
The sweet spot
ED102
- 102mmAperture
- f/7Focal ratio
- 714mmFocal length
The balance of aperture and portability. Razor-sharp, high-contrast views of the Moon and planets, with the light grasp for deep-sky imaging.
$1,432.00
03
Serious imaging
ED127
- 127mmAperture
- f/7.5Focal ratio
- 953mmFocal length
5 inches of FCD1 triplet with an adjustable front cell for precise collimation and a heavy-duty 2" two-speed rack-and-pinion focuser.
$2,148.00
04
Flagship
ED152 Carbon Fiber
- 152mmAperture
- f/8Focal ratio
- 1216mmFocal length
6 inches of apochromatic aperture in a carbon fiber tube that weighs just 20.5 lbs, light enough for mounts in the Losmandy G11 class.
$5,728.00
Looking for a mount, flattener or bundle? Find packages on each telescope's page.
Essential Series ED APO Triplets with HOYA FCD1 Glass