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Details about  Meade 10" LX200- ACF (f/10) Advanced Coma Free Telescope with UHTC #1010-60-03

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Meade 10" LX200- ACF (f/10) Advanced Coma Free Telescope with UHTC #1010-60-03
Meade-10-LX200-ACF-f-10-Advanced-Coma-Free-Telescope-with-UHTC-1010-60-03
Item Ended
Item condition:
New
Ended:
Feb 21, 2012
Price:
US $3,499.00
Shipping:
$50.00 Standard Shipping | See details
Item location:
Chicago, Illinois, United States

Description

eBay item number:
400246974180
Seller assumes all responsibility for this listing.
Last updated on  Jan 24, 2012 14:50:32 PST  View all revisions

Item specifics

Condition:
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is ... Read moreabout the condition
Brand:

Meade

Optical Design: Reflector - Ritchey-Chrétien Model:

LX-200-ACF w/UHTC

Mount Type: Double Fork with GPS Mount & GOTO MPN:

1010-60-03

Aperture: 10"

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Meade 10" LX200- ACF (f/10) Advanced Coma Free Telescope with UHTC

Specifications:

  • f/10 Advanced Coma-Free Optics
  • Meade Ultra-High Transmission Coatings (UHTC™)
  • Oversize Primary Mirror
  • Primary Mirror Lock
  • Smart Drive™
  • Sony®GPS Receiver Sensor
  • AutoAlign™
  • AutoStar® II

Includes: 

  • Autostar® II Hand Controller: 147,541 object database
  • Meade AutoStar Suite Astronomer edition software for PC
  • 1.25" Diagonal Prism
  • 8x50 Viewfinder with quick release bracket
  • GPS, True-level and North sensors: 16-channel GPS receiver
  • Eyepiece: Series 4000 26mm Super Ploss
  • Primary Mirror Lock: progressive tension
  • LS Field Tripod (heavy duty)
  • Full Meade One Year Limited Warranty- Telephone support line
  • Special new eyepiece kit INCLUDED UNTIL December 31, 2011*
*Purchase this LX200®  and receive a FREE newly announced Meade HD-60 Eyepiece Kit.
 The complete kit has a retail value of $399.00.

THIS NEW KIT includes the complete set of eyepieces: Series 5000 HD-60 4.5mm, 6.5mm, 9mm,12mm, 18mm, 25mm and Carrying Case. Note this newest Series 5000 Eyepiece Kit will be shipped directly from Meade. This special offer is good from Oct. 19, until 12/31/2011.

Helix Product #ME1010-60-03


The most widely used research quality telescope now features the most advanced optical system. Meade's LX200-ACF brings Advanced Coma-Free (ACF) optics within reach of aspiring astronomers everywhere. Nearly every observatory reflector in the world uses an aplanatic (coma-free) optical system like the Ritchey-Chrétien (RC), including NASA's Hubble Space Telescope. Now you can own similar optics to what the professionals use. The LX200-ACF includes all the field-proven features of the LX200 including Primary Mirror Lock, Oversized Primary Mirror, SmartDrive™, Smart Mount™, AutoStar® II, Sony® GPS Receiver Sensor + AutoAlign™  and more. The new LX200-ACF. It's the biggest news in astronomy since, well, the LX200.

UHTC

Ultra High Transmission Coatings

All about UHTC...

An important optional feature to optimize the performance of your Meade telescope.

Image brightness in a telescope is crucially dependent on the reflectivity of the telescope's mirrors and on the transmission of its lenses. Neither of these processes, mirror-reflectivity or lens-transmission, is, however, perfect; light loss occurs in each instance where light is reflected or transmitted. 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%.

Early reflecting telescopes of the 1700's and 1800's suffered greatly from mirrors of poor reflectivity reflection losses of 50% or more were not uncommon. Later, silvered mirrors improved reflectivity, but at high cost and with poor durability. Modern optical coatings have succeeded in reducing mirror-reflection and lens-transmission losses to acceptable levels at reasonable cost.

Meade Standard Coatings: The optical surfaces of all Meade telescopes include high-grade optical coatings fully consistent in quality with the precision of the optical surfaces themselves. These standard-equipment coatings from Meade include mirror surfaces of highly purified aluminum, vacuum-deposited at high temperature and overcoated with silicon monoxide (SiO), and correcting lenses coated on both sides for high light transmission with magnesium fluoride (MgF2). 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.

The Meade UHTC Group: Technologies recently developed at the Meade Irvine coatings facility, however, including installation of some of the largest and most advanced vacuum coating instrumentation currently available, 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. These specialized, and extremely advantageous, coatings are offered here as the Meade Ultra-High Transmission Coatings (UHTC) group, a coatings group available optionally on many Meade telescope models.

In Meade catadioptric, or mirror-lens, telescopes (including Meade ETX-90AT, ETX-105AT, and ETX-125AT; LX10, LX90, and LX200GPS Schmidt-Cassegrains; and LXD55-Series Schmidt-Newtonians) before incoming light is brought to a focus, it passes through, or is reflected by, four optical surfaces: the front surface of the correcting lens, the rear surface of the correcting lens, the primary mirror, and the secondary mirror. Each of these four surfaces results in some loss of light, with the level of loss being dependent on the chemistry of each surface's optical coatings and on the wavelength of light. (Standard aluminum mirror coatings, for example, typically have their highest reflectivity in the yellow region of the visual spectrum, at a wavelength of about 580nm.)

Mirror Coatings: Meade ETX, Schmidt-Cassegrain, and Schmidt-Newtonian telescopes equipped with the Ultra-High Transmission Coatings group include primary and secondary mirrors coated with aluminum enhanced with a complex stack of multi-layer coatings of titanium dioxide (TiO2) and silicon dioxide (SiO2). The thickness of each coating layer is precisely controlled to within 1% of optimal thickness. The result is a dramatic increase in mirror reflectivity across the entire visible spectrum; at the important hydrogen-alpha wavelength of 656nm. - the predominant wavelength of emission nebulae reflectivity is increased from 89% to over 97%.

Correcting Lens Coatings: Meade telescopes ordered with the Meade UHTC group include, in addition, an exotic and tightly-controlled series of coatings on both sides of the correcting lens or correcting plate, coatings which include multiple layers of aluminum oxide (Al2O3), titanium dioxide (TiO2), and magnesium fluoride (MgF2). Per-surface light transmission of the correcting lens is thereby increased at the yellow wavelength of 580nm., for example, to 99.8%, versus a per-surface transmission of 98.7% for the standard coating.

The importance of the Meade UHTC group becomes apparent when comparing total telescope light transmission, or throughput, caused by the multiplier, or compounding, effect of the four optical surfaces. With each optical surface contributing significantly to telescope light throughput, the effect of all four surfaces combined is indeed dramatic, as demonstrated by the graphs on the facing page, as well as by the table of the brightest nebular emission lines. At the H-a wavelength of 656nm., total transmission increases from 76.9% to 93.1%, an increase of 21%; at the helium wavelengths of 588nm. and 469nm. strong emission lines in hot planetary nebulae total telescope transmission increases by 18% and 19%, respectively; at the two nitrogen II lines of 655nm. and 658nm. and at the sulfur II line of 673nm., transmission is increased by 21%. Averaged over the entire visible spectrum (450nm. to 700nm.), total light transmission to the telescope focus increases by about 20%.

Observing with the UHTC: Meade ETX, Schmidt-Cassegrain, and Schmidt-Newtonian telescopes equipped with the Meade UHTC present 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. 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.

Emission Line Wavelength
(nm.)
Transmission: Standard
Coating (%)
Transmission: UHTC
Group (%)
Increase*
Hydrogen-alpha (Ha) 656 76.9 93.1 21%
Hydrogen-beta (Hb) 486 75.3 85.8 14%
Oxygen III 496 76.5 85.4 12%
Oxygen III 501 77.0 85.4 11%
Helium II 469 72.5 86.1 19%
Helium I 588 79.5 93.5 18%
Nitrogen II 655 77.0 93.2 21%
Nitrogen II 658 76.7 92.8 21%
Sulfur II 673 75.7 91.8 21%
* The % increase is obtained by dividing the UHTC-transmission (column 4) by the standard coatings transmission (column 3).

The overall effect of the UHTC is, as it relates to image brightness, to increase the telescope's effective aperture. Image brightness of the Meade 10" LX200GPS is, for example, effectively increased by about one full inch of aperture.

Effects on CCD Imaging: While the human eye loses sensitivity to light beyond wavelengths of about 700nm., CCD imaging chips remain sensitive to about 750nm. and longer, wavelengths at which the reflectivity of an aluminum coating is near its lowpoint. Importantly, however, the UHTC's total light transmission at 750nm. is about 83%, vs. about 72% for standard coatings, an increase of 83/72, or 15%.

 

Total Telescope Light Transmission by wavelength of light.

 





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