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1. #ETX 90EC MEADE AUTOSTAR 494 ISSUES IN THE YEAR 1996 FULL#
2. #ETX 90EC MEADE AUTOSTAR 494 ISSUES IN THE YEAR 1996 PORTABLE#
3. #ETX 90EC MEADE AUTOSTAR 494 ISSUES IN THE YEAR 1996 SERIES#
4. #ETX 90EC MEADE AUTOSTAR 494 ISSUES IN THE YEAR 1996 FREE#

At approximately 8 pounds, and 15 inches in length, it packs a lot of power into a compact unit. It offers cordless operation, allowing you to use the telescope's dual-axis drive system for more than 40 hours on eight AA batteries.

#ETX 90EC MEADE AUTOSTAR 494 ISSUES IN THE YEAR 1996 PORTABLE#

n The Meade ETX-90EC is specially designed to be portable and used in the field. This pushbutton electronic controller has four dual-axis drive speeds: slow, 8x for image centering at high power medium, 32x for image centering at lower power or for pushbutton tracking in altazimuth mode moderate, 0.75 degrees per second for image centering in the viewfinder or for terrestrial tracking and fast, 5 degrees per second for fast scanning across the sky.

#ETX 90EC MEADE AUTOSTAR 494 ISSUES IN THE YEAR 1996 FULL#

Observations of the Moon and planets, since they are observed in reflected (white) sunlight, benefit in image brightness from the full spectrum of increased transmission.n n And more The ETX-90EC also includes high-torque DC motors on both telescope axes, permitting electronic operation from the handheld controller. n This telescope presents dramatically brighter images on the full range of celestial objects — from emission and planetary nebulae such as M8, M20, and M57 to star clusters and galaxies such as M3, M13, and M101. the predominant wavelength of emission nebulae - reflectivity is increased from 89% to over 97%.

The result is a dramatic increase in mirror reflectivity across the entire visible spectrum at the important hydrogen-alpha wavelength of 656nm. The thickness of each coating layer is precisely controlled to within 1% of optimal thickness. This telescope includes primary and secondary mirrors coated with aluminum enhanced with a complex stack of multi-layer coatings of titanium dioxide and silicon dioxide.

#ETX 90EC MEADE AUTOSTAR 494 ISSUES IN THE YEAR 1996 SERIES#

n Ultra-High Transmission coatings (UHTC), recently developed at the Meade Irvine coatings facility, however, have permitted the vacuum-deposition of a series of exotic optical coatings precisely tuned to optimize the visual, photographic, and CCD imaging performance of Meade telescopes. Meade standard mirror and lens coatings equal or exceed the reflectivity and transmission, respectively, of virtually any optical coatings currently offered in the commercial telescope industry. Uncoated glass, for example, reflects about 4% of the light impacting it in the case of an uncoated lens 4% of the light is lost at entrance to and at exit from the lens, for a total light loss of about 8%. Neither of these processes, mirror-reflectivity or lens-transmission, is, however, perfect light loss occurs in each instance where light is reflected or transmitted. n n Image brightness in a telescope is crucially dependent on the reflectivity of the telescope's mirrors and on the transmission of its lenses. UHTC dramatically decreases this light loss. In the case of a lens, light is lost at both the entrance to and exit from the lens. n n n The UHTC Differencen n n n n Each time light encounters a mirror (above) or lens (below), some light is lost. Just plug the Autostar into the telescope's HBX port in place of the standard-equipment electronic controller, do a quick telescope alignment, and you're ready to observe any object in the Autostar's 30,000-object database. The Autostar controller turns the ETX-90EC into an automatic celestial-object locating system. It combines a high-resolution optical design and diffraction-limited imaging with microprocessor-controlled, precise celestial-object tracking, all in a nicely styled, highly portable package. The ETX-90EC Astro offers extraordinary optics at an affordable price. And with the ETX-90EC, Meade brings a serious telescope into the price range of the casual consumer.

#ETX 90EC MEADE AUTOSTAR 494 ISSUES IN THE YEAR 1996 FREE#

This telescope includes a free Autostar computer controller and deluxe field tripod with this ETX-90EC-a value of $349.

Meade ETX90EC Telescope w UHTC Autostar Controller 497 and Tripod 884 Description

Be sure to view everyday offer of Meade ETX90EC Telescope w UHTC Autostar Controller 497 and Tripod 884 on this website. Welcome to shop for Meade ETX90EC Telescope w UHTC Autostar Controller 497 and Tripod 884 blog, together with testimonials, industry information, and buying guides. Compare Meade ETX90EC Telescope w UHTC Autostar Controller 497 and Tripod 884 reviews