The Meade 80mm Series 6000 ED Triplet APO Refractor Telescope is one of the best crafted refractors on the market. Each refractor is individually constructed and tested to ensure that they meet our highest standards, both optically and mechanically. The Series 6000 Apochromatic Refractors will fill the need of the most discerning astronomer. For crisp wide-field observing and imaging, nothing can beat a true three-element Apochromatic Refractor. 3 Element Optical Design. These telescopes were built with the observer and imager in mind. With the three element optical design using the highest grade extra-low dispersion optical glass, false color is virtually eliminated, yielding astonishing color correction, contrast, and sharpness. 2.5-Inch Dual-Speed Rack-and-Pinion Focuser. New to the Series 6000 Triplets APOs is the proprietary 2.5-inch dual-speed rack-and-pinion focuser. The focuser comes with a 10:1 fine focus knob for precise focusing. It includes millimeter markings on the drawtube to assist with focusing accuracy and is also rotatable which allows for easy framing of the photographed object. Its 2-inch self-center locking ring that allows diagonals or cameras to be well centered to the optical train every time the locking ring is engaged. 0.8x Focal Reducer/Field Flattener. In addition to the deluxe focuser the Series 6000 Apochromatic Refracting Telescopes now have an optional 0.8x Focal Reducer/Field Flattener for photographic purposes. For wide field images the 2-inchfocal reducer/flattener will reduce this 80mm refractor from f/6 to an f/4.8.