Explore Scientific's largest refractor telescope incorporates our true three-element apochromat design the ED165-FPL53 with an aperture of 165mm (6.5-inch) utilizes one of the highest performance extra-low dispersion materials obtainable: OHARA FPL-53 ED Glass. Reveal celestial wonders like the desolate beauty of the lunar terrain, the serene structure of Saturn’s rings or some of the most challenging deep sky objects with Explore Scientific’s ED165-FPL53 Air-Spaced Triplet Apochromatic Refractor.
Combining FPL-53 with optical glass of high refractive index allows us to achieve unprecedented advanced chromatic aberration correction. OHARA FPL-53 is considered one of the best glass types ever produced. Having a true diffraction-limited optical design, this large high performance refractor is a perfect grab-and-go instrument for exploring the skies.
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.
Featuring an air-spaced triplet optical design that virtually eliminates chromatic aberrations, this telescope generates brilliant high-contrast images by combining genuine OHARA FPL-53 extra-low dispersion (ED) glass and proprietary EMD enhanced multi-layer coatings on all optical surfaces.
In addition, this amazing scope also includes a 3" Hexagonal focuser with very rigid design and strong support. Up to 10 lbs of gear can be loaded onto this focuser.
ED165mm f/7 Air Spaced Triplet with Ohara FPL-53 optics and Integrated Dew Shield; 1155mm focal length; 3" HEX Focuser; Cradle Ring with Handle and Vixen Style Dovetail Plate; Explore Finder Scope Base installed on scope; 99% Reflective 2" Diagonal; and a hard TSA approved carrying case. (Finder Scope NOT Included)
|Tube Length w/ Dew Shield||52"; 1320mm|
|Tube Length w/out Dew Shield||41"; 1041mm|