127mm 5" Aperture Newtonian Optical Tube with all-glass mirrors / 1.25" rack and pinion focuser / 4mm 1.25" 250x high and 20mm 50x low power eye piece # The Celestron PowerSeeker 127 is a 5" equatorial reflector with a big enough Aperture to show clear views of the brighter star clusters, nebulas, and galaxies. Its Newtonian Reflector optics give you detailed and sharp views of the Moon and planets without the faint purple haze of chromatic Aberration (spurious color) that surrounds every bright object in every refractor scope in this price range. The construction of the Optical system has all-glass optical components with high reflectivity aluminum mirror coatings for enhanced image brightness and clarity. The equatorial mount has slow motion controls in both axes, to let you easily track objects across the sky. The Celestron PowerSeeker 127 has a light grasp 329 times that of the sharpest eye. The 1.25" focuser has dual focusing knobs for precise image control with either hand. The large focus knobs are easy to operate, even while wearing gloves or mittens in cold weather. The 4mm eyepiece is right at the scopes usable magnification limit on the rare nights of very good seeing conditions. An Optional 6mm or 7mm eyepiece comes closer to providing the highest useful power on a night in/night out basis. By aligning the mount on the north celestial pole, you only need to turn one slow motion control knob to follow planets and stars as they travel across the sky. A counterweight on the opposite side of the mount from the telescope balances the weight of the optical Tube and makes it easy to move the scope effortlessly from one part of the sky to another. There are two slow motion control knobs connected to the mount by long flexible cables so they are easy to reach while observing. Includes: 127mm aperture Newtonian reflector optical tube with 1.25" rack and pinion focuser, equatorial mount with setting circles, manual slow-motion controls, and locks on both axes, 4mm (250X) and 20mm (50X) 1.25" eyepieces, 3x 1.25" Barlow lens, 5x 24mm straight-through finderscope, operating instructions, TheSky Level 1 CD-ROM software, and adjustable height aluminum tripod with accessory tray # 200x Highest Useful Magnification # 13.0 Visual Limiting Magnitude # 1000mm Focal Length # 7.9 Focal Ratio # 0.91 arc seconds Resolution # 5" Aperture
