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Again, the red film telescope, the more reddish movie itself is a reflection movie, therefore the red film not only does not increase the brightness of this telescope, on the contrary, in addition, it reflects a portion of the light, which makes the imaging skinnier.

learn from:https://binocularlab.com/best-10x50-binoculars-reviews-2017-top-8-selections/

All of these are made of metal. The reliability of plastics is certainly not great for alloys, so the durability of metallic structure telescopes is your best as we all know. And what kind of prism used by the telescope is also quite significant, the general usage of prism BAK4 and BAK7, the refractive index of these two types of glass is different, the refractive index of this BAK4 is elevated, for its Porro prism of this BAK4 substance, the incident light may be reflected completely when the absorption is not taken into account, and also the BK7 can reflect only about 83% of the incident light, so BAK 4, the optical efficiency is so high, but its price is also expensive. The BAK4 prism is employed in telescopes and a few mirrors. The simplest approach is to find the shape of the pupil behind the eyepiece.

Considering the substance and the material of the telescope, you can find 3 kinds of materials to the telescope.

To start with, the size of the telescope is believed, the dimensions of the telescope is set by the scale and also the aperture of this thing mirror. It is a contrast of this telescope of this 10X50 specification. 10 signifies the multiple, and also the 50 represents the diameter of the aperture of the item lens.

If you'd like to hold a telescope. The best option in multiples of 6-12 times that the ratio is low, so the needs can not be met by the atmosphereand ratio is too large, seem, very strong image jitter fuzzy, there is a very long time little dizzy. Therefore that the multiplier is not the greater the greater, the high number of this telescope, the size of the item mirror is additionally required, the large number of telescopes, the dimensions of the larger, and quite heavy, the need to match the three toes fixed to determine. The aperture of the telescope is also very important. The more telescope of the exact multiple, the larger the object mirror's aperture, the greater the total amount of light in the telescope, that is the spot in the image. So light moves in the eyes, and it seems comfortable. The lens is extremely little, the imaging is very dark, the field is very small, when the multiple is high, and it looks uncomfortable. The telescope that contrasts the 8X42 specifications looks more comfortable than the 8X25 telescope that is standard. But if the range of the object lens is bigger, the telescope's size is too large, so it's a bit contradictory. When the telescope is chosen by you, it is necessary to generate a trade-off between the relaxation and the portability.

All vinyl to do.
It is a mixed structure of metal and plastic (the key parts are metal).
In light of this optics of this telescope, the quality of the optics of this telescope is extremely important. This coating's consequence is to decrease the light on the lens of the telescope. The coating that is worse is only coated onto the lens component of the telescope (usually the outside surface of the object mirror and the eyepiece), and also the great mirror is going to be plated on the surface of all of the lenses. The mirrors with mirrors that are better will deposit films . The best mirrors will have multilayer coatings on most of the lenses. That is the reason the exact same size of this telescope, one of the important causes of the price is far worse, the most simple approach to estimate the caliber of a mirror is to see the manifestation of the mirror, and the dark the light the more translucent the lens, the greater the coat.


Latest Activity: Apr 13, 2018 at 1:57 AM


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