The telescope optics: The Sky-Watcher Evostar DS Pro telescope series has the same premium optics as our – meanwhile – legendary Equinox ED apochromatic refractors, which, due to their obstruction-free optics, produce diffraction patterns like from the textbook. They have the sharpest image and offer the highest quality of imaging. These high-end telescopes all have a doublet lens. One element is made of high quality extra-low dispersion (ED) glass. This virtually eliminates chromatic aberration to deliver true color reproduction. Top quality glass is also used for the crown glass element. State-of-the-art dielectric coating each air-to-glass lens surface to ensure optimal light output, achieving approximately 99.5% light transmission with the anti-reflective metallic coating. Skywatcher’s own “Metallic High Transmission Coating” (MHC) is one of the best in its field. Scope of delivery: 120mm F/900mm optical tube dual speed focuser 2” with 11:1 reduction 9×50 viewfinder 2” 28mm LET eyepiece 2” star diagonal tube clamp and mounting rail Aluminum transport case! Power supply and batteries are not included in the scope of delivery!