Ra 250RC F8 OTA by Levenhuk

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$2,678.65 / EA
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Ritchey-Chretien telescope. Objective lens diameter: 250 mm. Focal length: 2000 mm Levenhuk Ra 250RC F8 OTA is designed specifically for astrophotography and has a focal length of 78.8 inches and an objective lens diameter of 10 inches. This model has a quartz primary mirror covered with 99% reflection power dielectric coating. The main advantage of quartz glass is its low thermal conductivity coefficient. The telescope is also equipped with a dual-speed Crayford focuser that ensures high precision focusing with no backlash. The model comes with a built-in fan for cooling the primary mirror and has a sturdy metal shell. Another important advantage of Levenhuk Ra 250RC F8 OTA is its smaller dimensions compared to Newtonian telescopes so a smaller mount can be used. We recommend using the Levenhuk 0.75x focal reducer with any Ritchey-Chretien model. Specifications: Optical design: Ritchey-Chretien Mirror shape: hyperboloid Optics material: quartz Optics coating: dielectric, 99% reflectivity Primary mirror diameter (aperture), in: 9.8 Focal length, in: 78.7 Focal ratio: f/8 Secondary mirror minor axis, in: 4.1 Focuser: 2'' dual-speed Crayford Tube-mount assembly system: dovetail plate Optical tube material: steel Optical tube length, in: 29 Optical tube diameter, in: 11.8 Optical tube weight, lbs: 35.2 Total weight, lbs: 46.7

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