Meade LX200-ACF 12 inch User Manual - Page 15
Choosing an Eyepiece
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Series 4000 26mm Super Plössl Eyepiece Series 5000 26mm Plössl Eyepiece (Standard on 16" LX200-ACF) Choosing an Eyepiece A telescope's eyepiece magnifies the image formed by the telescope's main optics. Each eyepiece has a focal length, expressed in millimeters, or "mm". The smaller the focal length, the higher the magnification. For example: An eyepiece with a focal length of 9mm has a higher magnification than an eyepiece with a focal length of 26mm. Your telescope comes supplied with a 26mm Plössl eyepiece which gives a wide, comfortable field of view with high image resolution. Low power eyepieces offer a wide field of view, bright, high-contrast images, and eye relief during long observing sessions. To find an object with a telescope, always start with a lower power eyepiece such as the 26mm Plössl. When the object is located and centered in the eyepiece, you may wish to switch to a higher power eyepiece to enlarge the image as much as practical for prevailing seeing conditions. For information about optional eyepieces for the your telescope, see OPTIONAL ACCESSORIES, page 44. The power, or magnification of a telescope is determined by the focal length of the telescope and the focal length of the eyepiece being used (an eyepiece's focal length is printed on the side of the eyepiece). To calculate eyepiece power, divide the telescope's focal length by the eyepiece's focal length. For example: A 26mm eyepiece is supplied with LX200-ACF models. The focal length of the 8" f/10 LX200-ACF is 2000mm (see SPECIFICATIONS, pages 50 through 52). Eyepiece Power = Telescope focal length ÷ Eyepiece focal length Eyepiece Power = 2000mm ÷ 26mm Eyepiece Power = 77 The eyepiece power, or magnification is therefore 77x. Note: For a list of magnification ratings of the eyepieces available for the LX200-ACF telescopes, see OPTIONAL ACCESSORIES, page 44. Note: The microfocuser is shipped with the microfocuser adapter (B) threaded to the SC accessory adapter (L). Unthread the adapters from each other before attaching the microfocuser. - 15 -