Promotion telescope choose multiple telescope suitable for you
Source:Ruilong Time:2011-1-26Promotion telescope choose multiple telescope suitable for you? Generally speaking, common handheld type telescope multiples is unfavorable exceed 10 times,Promotional Binoculars because hand will have a slight shaking of the telescope, through telescopes, the corresponding jitter amplifier, the higher multiples put the bigger the jitter, a sharp jitter objects, eye there is no way to see clearly. This also is military telescope magnifacation usually only 7/8 times reasons.
Even on the tripod observation telescope, multiples is limited, because the air suffer ground buildings and other factors, density is not uniform, when distant observed object reflex (or transmission, emission of light) through these density of non-uniform atmospheric happens slight refraction, causing images fuzzy. But the telescope is taller, the fuzzy multiple the more obvious. Generally speaking, in low altitude in cities, telescope multiples with no more than 40 times advisable.
Magnification is actually a smaller field of view. In this way, it is disadvantageous to discover and target, to often switch targets of observation especially adverse. Even if is to look for the target, tripod shaking slightly easier missing target. As for not automatic tracking device, often should manual adjustment can make goals keep on in sight.
Promotion telescope improve multiples, still must improve the objective corresponding requirements to ensure that the calibre of the imaging have enough brightness, no brightness of imaging couldn't see clearly the human eye is. Thus, the volume weight and telescope price will rise sharply. So, should not be one-sided pursuit multiples on market, as many elevation times telescope, multiples usually have exaggerated, also have a few multiples is true, appear this kind of circumstance of the reason is very simple, factories and businesses primary purpose is the pursuit of profit, not popularization correct telescope knowledge, since market needs at high magnification, the telescope, and guide the correct consumption, still be inferior to cater to the consumptive idea of simple, general diameter larger and multiples of some high telescope discerning high ?
Need special emphasis is, telescope multiples affect just resolution of the numerous associated factors of a, blind pursue big multiples is not advisable.
How to discern promotion telescope inferior, generally speaking, inferior telescopes have several typical features:
1, the weight is very light, this is because massive adopted plastic to reduce cost, Gift and plastic density is very low
2, plating red membrane, so can factually telescope infrared night-vision with function
3, appearance colorful, so can pretend to be military telescope, when the true military telescope and basic it is black
4, look for a long time, this is because to improve dizzy, have no time to yield a cylindrical tube axis calibration two parallel degree
5, packaging pallet, 3 without the product sales sites in 6, commodity wholesale market, or flow vendors. Buy inferior telescope, not only suffered economic loss, used for long, for eyesight also hurt
Last bit of advice: don't use the telescope directly observed the sun, can cause severe harm to the eyes!
Key words:Promotional Binoculars, Gift & Promotional Binoculars
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