Sea Tidbits: the larger the diameter of the pupil. The brighter the image. Eye pupil diameter in complete darkness when the maximum Jay and telescope shops, 7 mm kit and telescope manufacturers, so the pupil should not exceed 7 mm diameter telescope Jay and prices, 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. Eye Eye pitch pitch refers to the distance eye point between the eyepiece lens. When the eye into the right eye point, you can see clear and complete vision. High-eyepoint design binoculars have a longer eye pitch, enabling the user to wear glasses can see clear and complete vision. 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. Jay and binoculars, sea breeze electronic (certification), and telescopes provided by Xinzhou Jie 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.