Telescope 50360 Refractor
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Description for Telescope 50360 Refractor
• Refractor Telescope • Diameter: 50 mm • Focal length: 360 mm • In this type of telescope light rays coming from the object observed parallel to the goal, it's refracted concentrating them at one point, the "focus", "focal point" or "focal plane". There is located the eye that amplifies the image and makes the light rays leaving that parallel. • Among the advantages refractors may be mentioned that a closed tube having no moisture or dust in the path of light rays, as well airflow is also avoided. As the ratio of the focal length and the diameter of the lens, called focal ratio F / D is large and there is no central obstruction to modify the diffraction pattern, the contrast of the image is larger and a good resolution so it is a recommendable for planetary observation instrument.