Meade 70AZ-T instruction manual Power, Eyepiece, With 2X Barlow Lens, Maintenance

•The Moon: Our Moon offers craters, mountain ranges and fault lines. The Moon is best observed during its crescent or half phase when sunlight strikes the Moon’s surface at an angle—resulting shadows add a sense of depth to the view. No shadows are visible during a full Moon, causing the Moon’s surface to appear flat and uninteresting.

•Deep-Space:Deep Space objects are best viewed at a dark site, away from city and other lights. Such objects include nebulae, galaxies, multiple star systems, and star clusters.

•Terrestrial objects: Your telescope may also be used for high resolution land viewing. Terrestrial observations should almost always be made using a low power eyepiece (such as the 17.5mm) for bright, sharp images. Land objects offer limited applications at higher powers because the telescope is being pointed through the thickest part of the Earth’s atmosphere, which typically distorts images in the eyepiece.

The general rule regarding power: Only use as much magnification as supports a steady, well-defined image. The stability of the air varies and is one reason why having various eyepieces is highly desirable. Higher powers are no guaranty of better images; in fact, the opposite is often true. Keep in mind, that land viewing and wide-field,deep-space observation generally operate best with low-powered eyepieces.

POWER

The power, or magnification, of a telescope when used with a particular eyepiece is determined by two factors: the focal length of the telescope’s main (objective) lens and the focal length of the eyepiece being used. The Barlow lens doubles the power of an eyepiece. To use the 2X Barlow lens, place the Barlow into the roof prism (3), followed by the eyepiece. Use the thumbscrew to tighten in place.

The magnification values available with your eyepieces are as follows:

Eyepiece	Power	With 2X Barlow Lens
MA17.5mm	20X	40X
MA9mm	39X	78X

MAINTENANCE

The Meade 70mm Compact Refractor telescope should be stored in a dry and dust-free location. It should not be stored in direct sunlight. Avoid overcleaning the lens. A little dust on the the lens hardly affects image quality.

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