Evostar 150DX ED Doublet APO Refractor

150 mm apochromatic refractor with matched lens assembly with one EDelement 1200 mm focal length (f/8) Dual-speed 3.4” rack-and-pinion focuser Tube-ring attachment hardware with V-style dovetail plate Aluminum case Sky-Watcher Evostar refractors provide the finest images obtainable in their design class. These doublet refractors deliver dramatic, coal-black skies and faithful, contrast-rich views of planetary and deep-space phenomenon that are second to none. Sky-Watcher Evostar refractors are the logical choice for the discriminating amateur astronomer looking for an investment in advanced instrumentation for exceptional viewing and astrophotography. Specifications Optical Design ED Doublet Focal Length (mm) 1200 Focal Ratio 8 Lens Elements 2 Lens Glass Matched lens assembly with one ED element Focuser 3.4″ Dual Speed R&P Included Eyepieces None Included Finder None Included Diagonal None Mount Type D-style dovetail OTA Length 50.5