Read and download Meade Telescope ETX AT Instruction Manual online. Download free Meade user manuals, owners manuals, instructions, warranties and installation guides, etc. The Celestron 60LCM Computerized Telescope includes a 60mm refractor telescope and comes with the LCM lightweight computerized mount. A built-on finder scope helps with alignment and object location. Good for terrestrial and celestial observing.

Download descargar resident evil code veronica ps2 iso download pc. The Model 4500 provides stunning optical performance on the Moon, planets, and in deep-space, where its larger aperture is most advantageous. The telescope includes a high-precision equatorial mount with manual slow-motion controls on both axes. The all-aluminum tripod allows for a solid, but lightweight, observing platform. #531 Electric Motor Drive: For fully automatic tracking of astronomical objects, the Meade #531 Motor Drive is available for attachment to equatorial telescope Models 285, 395, and 4500. A Word about “Power:” When buying a telescope one of the least important factors to consider is the power, or magnification, of the instrument. The key to observing fine detail, whether on the surface of the Moon or on a license plate one mile in the distance, is not power, but aperture- i.e., the diameter of the telescope’s main (objective) lens or primary mirror.

The power at which a telescope is operating is determined by the eyepiece employed; all Meade telescopes include one or more eyepieces as standard equipment, and optional eyepieces are available for higher or lower powers. Within reason power is useful, but the most common mistake of the beginning observer is to “overpower” the telescope and to use magnifications which the telescope’s aperture and typical atmospheric conditions can not reasonably support. The result is an image which is fuzzy, ill-defined, and poorly resolved, through no fault of the telescope.

Keep in mind that a smaller, lower-power, but brighter and well-resolved, image is far superior to a large, high-power, but dim and poorly-resolved, one. How to Calculate Power: The magnification, or power, at which a telescope is operating is a function of the focal length of the telescope’s main (objective) lens (or primary mirror) and the focal length of the eyepiece employed. The focal length of the objective lens is the distance between the lens and the point at which it brings light rays to a focus; this focal length (in mm) is printed on a label affixed to the optical tube of every Meade telescope. The focal length of each eyepiece (which typically ranges from 4mm to about 40mm) is printed on the upper surface of the eyepiece.

To calculate power, divide the focal length of the eyepiece into the focal length of the objective lens. Example: The Meade Model 390 telescope has an objective lens focal length of 1000mm; when this telescope is used with a 25mm eyepiece, a power of 1000 ÷ 25 = 40 power (written as “40X”) results. Choosing Your Eyepieces: Depending on how much you plan to use your telescope, and for what applications, you may wish to add 2 or 3 eyepieces and/or a multiplying “Barlow” lens, to the eyepieces included as standard equipment.