Taiyuan sea Tidbits: FullyCoated (full surface coating): All the lenses and prism surfaces are coated with a monolayer film 贝格士 telescopes offer, but if the use of optical plastic lenses in the eyepiece, you may not be coated. Multi-Coated (multi-coated): at least one surface coated with a multilayer film, other surfaces may be coated with a monolayer film, it may simply not coating, usually only the outer surface of the objective lens and eyepiece plated multilayer film. Taiyuan sea breeze Electronics Co., Ltd. The company was established in 2002 贝格士 telescope monopoly, specializing in wholesale sales telescope Beige Shi telescopes, binoculars, outdoor equipment. Company in good faith, customer-oriented objectives grown to thirteen brands Shanxi telescope first year. Sea Tidbits: the larger the diameter of the pupil. The brighter the image. Eye pupil diameter in complete darkness when the maximum of 7 mm, so the exit pupil diameter no greater than 7 mm, or part of the light entering the pupil will because they can not be lost in vain. General. Binoculars for astronomical observation exit pupil diameter of about 7 mm is appropriate. Taiyuan sea breeze Electronics Co., Ltd. The company was established in 2002, specializes in wholesale sales telescopes, binoculars, outdoor equipment. Company in good faith, customer-oriented objectives grown to thirteen brands Shanxi telescope first year. Beige Shi telescope stores, sea Electronics (certified), provided by the telescope Beige Shi Jincheng Electronics Co., Ltd., Taiyuan sea breeze. Taiyuan sea breeze Electronics Co., Ltd. (www.tyhfdq.com) is Taiyuan, binoculars leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. E-leadership in the sea breeze with the staff warmly welcome all inquiries negotiations to create a better future for electronic sea.