Explore Scientific ED80 80mm Air-Spaced Triplet Apochromatic Refractor - SKU1195
E- Excellent Minus - Shows sign of moderate use.
When the designers at Explore Scientific set their sights on creating a top-quality Essential ED80 80mm Air-Spaced Triplet Apochromatic Refractor that anyone would be proud to own, they decided on a traditional air-spaced triplet optical design in a rugged, adjustable lens cell. All materials had to be top-notch, so genuine Hoya extra-low dispersion (ED) Dense Fluor Crown (FCD1) glass was chosen and then experienced craftsmen shaped and polished the elements that would form the foundation of a high-quality, true APO refractor.
All Explore Scientific Air-Spaced Triplet APO Refractors are diffraction-limited at .25PV or better. Special EMD enhanced multi-layer coatings are deposited on all optical surfaces and the result is bright, high contrast images with virtually no light scatter. While optics are definitely the most important component of any telescope, other features, like the focuser and the optical tube, play a crucial role in the design.
The Critical Element: Optics
Explore Scientific uses ED (Extra-low Dispersion) FCD1 (Dense Fluor Crown) glass. Using the right glass with the appropriate properties enables the production of lenses that offer superior sharpness and color correction.
Deluxe Two-Speed Focuser
On pristine nights of steady seeing, Saturn's Rings can forever affect the hearts and minds of almost anyone who lays eyes on them. It's nights like these that astronomers like to set up their refractors and push the magnification to the limits, not only to see the magnificence of the planet at greater scale but to really test the optical and mechanical quality of the telescope. Many telescopes are only supplied with a standard single-speed focuser, you will find that a tiny nudge will throw out focus and turn your night into one of frustration. Explore Scientific has included as standard equipment, on this telescope, a two-speed Crayford-style precision focuser with tension adjustment and lock to obtain and hold perfect focus.
EMD (Enhanced Multi-layer Deposition) Coatings eliminates light scatter and maintains high image contrast. This proprietary coating is applied to all Explore Scientific lenses in multiple layers for added durability. Contrast is further enhanced by the installation of multiple baffles in the optical tube that mask and deflect unwanted stray light.
- Vixen-style Dovetail
- Two-Speed Crayford-style Precision Focuser with Tension Adjustment and Lock
- 1.25" Eyepiece Adapter
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Filed under: High-End Telescope Auctions (USA)