Sea Tidbits: Advantages refracting telescope is focal length, large scale film on the tube bend-insensitive, best suited to do astrometry aspects of the work. But it is always residual chromatic aberration, while the ultraviolet and infrared radiation absorption band is very powerful. And great optical glass casting is also very difficult to buy a telescope, the Yerkes telescope built in 1897, reflects the culmination of the development of the telescope, the next hundred years, no bigger refractor appear. This is mainly because technically can not be perfect casting a large piece of glass lenses, and, due to the large size of the lens distortion gravity will be very obvious, and therefore lose focus Octavia. Taiyuan sea breeze Electronics Co., Ltd. The company was established in 2002, specializes in wholesale sales telescopes, binoculars, outdoor equipment. Sea Breeze Description: Maksutov Maksutov-style 1940 with a meniscus lens as the correct lens shape, creating another type of catadioptric telescope telescope, two surfaces which are two different spherical curvature single tube telescope, or less, but the curvature and thickness are great. It's all surfaces are spherical telescope price than Schmidt telescope corrections board easy to grind, the barrel is relatively short, but the field is smaller than the Schmidt telescope, glass requirements are higher. Because catadioptric telescope able to combine the advantages of refraction and reflection of two telescopes, is very suitable for amateur astronomy and astronomical photography, and has been loved by the majority of astronomy enthusiasts. Jincheng telescope telescopes _ _ breeze provided by electronic Electronics Co., Ltd., Taiyuan sea breeze. Taiyuan sea breeze Electronics Co., Ltd. (www.tyhfdq.com) strong, credible, in Taiyuan, Shanxi telescope industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead you hand into the sea of ??electrons and brilliant, for a better future!