More Information  · Supplied Accessories Price $599.00 List Price $957.95 Highest Useful Magnification 250x Visual Limiting Magnitude 12.9 Focal Length 1000mm Focal Ratio f/8.3 Resolution 0.97 arc seconds Aperture 4.7" Net Weight 46 lbs. Ship Weight 64 Heaviest Single Component 21 lbs. Warranty 2 years

• Refractor optics: 4.7” (120mm) aperture, 1000mm focal length, f/8.3 achromatic doublet lens using aspheric shaping technology for images that have virtually no spherical aberration. Chromatic aberration (spurious color) is present, but well controlled for a scope of this aperture. The lens cell is fully collimatable for optimum sharpness. The optical tube length is a very manageable 40”.

• Starbright XLT multicoated optics: Fully coated on all air-to-glass surfaces with multiple layers of magnesium fluoride and hafnium dioxide antireflection coatings for the highest possible light transmission and contrast. They are the same coatings used on Celestron’s largest most expensive optical systems.

• Lens cap/aperture stop: A protective lens cap is provided to cover the objective lens of the telescope and keep it dust-free when the scope is not in use. This lens cap has a built-in aperture stop in the center. When observing the Moon and planets, leaving the lens cap on the telescope with the aperture stop removed will reduce the scope’s chromatic aberration (the faint halo of violet light or “spurious color” visible around very bright objects in all achromatic refractor telescopes). The scope’s resolution will be slightly reduced, but eliminating the spurious color provides a generally more pleasing image for most observers. The lens cap should always be completely removed when observing faint deep sky objects such as nebulas and galaxies, where aperture (light-gathering) is essential and chromatic aberration is not an issue.