Apochromatic Refractor Telescopes

Astro-Tech has built this optical tube by increasing their previous aperture of 66mm to a now 72mm. This allows 9% higher resolution and 19% better light gathering. In addition, a new and updated focuser has been supplied with this telescope.

This green optical tube from Astro-Tech is a piece of equipment every advanced serious astronomer should consider. With high quality refractive optics, fabulous accessories, it is pretty amazing. Some of the key features of this item include the dual speed rotating focuser (10:1 ratio focusing) and high quality ED optics great at preventing chromatic aberration. This scope is so high key, Astronomy magazine designated it previous version a “a great grab-and-go scope, a fine little astrograph, a super-finder scope, and a daytime spotting scope.”. Now, Astro-Tech has added even more to the picture.

This 111mm triplet refractor from Astrotech has an increase of 18% light transmission when compared to a 102mm refractor ota. This telescope is a huge investment, as it can save you a maximum of $800 dollars for a telescope with better optics and light transmission as opposed to other refractors with similar apertures. Featuring Ohara glass, this refractor delivers sharp images that can avoid chromatic aberration.

Astro-Tech has equipped this telescope with a 2.7" Linear Crayford focuser, with a 10:1 focusing ratio. This 360° rotatable focuser allows the observer to place their eyepieces anywhere they please, and the 2" and 1.25" compression rings protect the eyepieces when mounted.

Safe and secure portability is also crucial in extending the life of your telescope and preventing where in tear, so Astro-Tech has included an aluminum-frame carrying case with their 130mm Refractor.

This triplet refractor from Astro-Tech has an aperture of 90mm and a focal ratio of f/6.7. Featuring high quality glass and amazing accessories, this telescope is definately a wise choice.

The pinnacle of our ED scopes, this refractor is packed with great features and excellent optics. The refractor style 100ED (APO) features a 2" rack and pinion focuser and has a bracket that can adapt to a photo tripod

• APO Quality - Quantum refractors are designed to assure virtual elimination of residual chromatic aberration ("false color") normally present in 2-element achromatic lens designs. Using extra-low dispersion (ED) glass, S-FPL51, for two of the lens elements and Schott glass for the other three lens elements, the Quantum 100ED 5-element design delivers crisp, high-fidelity views of planetary.
• F/5 Focal Ratio - excellent for visual and wide field imaging use.
• Field Flattener – the Quantum 100 has a built-in two-element field flattening lens that provides sharps, in-focus stars across a large 43 mm image circle.
• Precision Linear Bearing Focuser - Optical focus is achieved by means of a mechanically ultra-smooth, backlash-free, precision linear bearing focuser with giant 3" diameter drawtube. This rotatable focuser offers 2-speed fine and micro-fine focusing adjustments with an engraved scale. Includes 2" eyepiece adapter.
• Carbon Fiber Optical Tube - Dent and scratch-resistant carbon fiber optical tube not only provides a stylish protective finish but also delivers excellent thermal stability and mechanical stiffness.
• EQ Mount Ready - All-metal tube rings and a CGE-style dovetail plate makes Quantum refractors ready to be mounted on any of Celestron's high quality imaging platforms, like the CGEM or CGEM Deluxe equatorial mounts.
• Retractable Carbon Fiber Lens Shade - For compact and safe storage.
• Aluminum Case - Offers protection for your instrument.

Sky-Watcher Quantum top of the line ED-APO refractors offer premium optical performance for the discriminating amateur astronomer and imagers

Each lens element is individually inspected for purity and absence of striations and other image-degrading imperfections. Every lens is pitched polished to exacting standards of optical fabrication and performance by highly skilled opticians and tested on an optical laser bench to rigidly controlled optical standards. The result is high-quality, diffraction-limited optics performing to the theoretical limits of their respective aperture sizes.

• ED102 Air-Spaced Triplet Refractor in Carbon Fiber
• Retractable Dew Shield
• Push/pull collimation cell
• Two-Speed Focuser
• Deluxe Case
• 99% 2-inch diagonal

The 80mm f/6 ED Apochromatic triplet from Explore Scientific is a great air-spaced triplet refractor telescope for observing as well as for use in photography of celestial objects. This wide field instrument utilizing Hoya ED glass, comes equipped with a 99% dielectric-coated 2-inch diagonal as well as a 8x50 viewfinder making it easy to locate objects. A flight ready case with a foam insert is also included with the telescope as well as a dew shield and dust covers.

This version is replacing the original TED0806-00 optical system. This new version does NOT include a finderscope; must be purchased separately.

The 80mm f/6 ED Apochromatic triplet from Explore Scientific is a great air-spaced triplet refractor telescope for observing as well as for use in photography of celestial objects.

Explore Scientific 127mm f/7.5 Air-Spaced Triplet  ED Apochromatic Refractor The Explore Scientific 127mm f/7

Comes with 2 Speed Focuser, 8x50 erect Image Illuminated Finderscope, Enhanced 99% reflective 2" diagonal and The deluxe Case.