The children used to play himself astronomy gifts or good can slowly understand astronomy
The matching condition
Refraction type / length: 360mm, aperture: 50mm
Be composed of: 90 times, 18 times and 3X doubler can be 180 times, 36 times (3X doubler and the need to purchase)
Visual penetration magnitude: 10.49
Theory resolution: 2800 arcsec, which is equivalent to that 1000 meters apart two objects 1.357 cm.
Portable packing carton size: 440mm*210mm*100mm
The main lens color: silver, white, golden, blue (factory batch vary)
Weight: 1.5 kg
* maintenance of astronomical telescope *
Astronomical telescope is a precision instrument, maintenance will have a direct impact on the service life of the telescope. Astronomical telescope must be special, special custody, non-professionals do not easily disassembly and repair.
The optical system for astronomical telescope there are several groups of lens, consisting of several groups of eye lens and other optical elements, must do:
(1) ensure the dome and telescope room ventilation dry, clean. Rainy days and try not to open the lens cap,
(2) all of the eyepiece, prism, the two imaging lens and other optical components and accessories, when not in use, please put in a drying box with desiccant or drying cylinder, at the same time should always pay attention to replace the new desiccant.
(3) the dust optical mirror, blow the ear ball gently blowing, can't blow with the mouth, so as not to spit splash at the mirror. Optical mirror do not hand to touch, leave fingerprints often left permanent traces of corrosion. Once you leave fingerprints as soon as possible, cleaning, mixed with a liquid drop anhydrous ethanol and ether 50% in clean gauze, from the center of the mirror in a clockwise or counterclockwise direction gently to the mirror edge brush, only in one direction. So far, until the wipe. For the aluminum surface, do not wipe, lest the aluminum film falling.
(4) portable telescope as far as possible not to heavy fog in the edge of the forest, water and salt many seaside observation, if have no alternative against one's will observation, observation after wipe it again as soon as possible.