Nowadays, users choose aluminum alloy screens when choosing screen windows. Aluminum screen screens are also one of the screens that are currently sold in the market. Aluminum screen screens are not only convenient, but they are also a trivial task. There are many users who are not very familiar with the prices of aluminum alloy screens . The following small series will introduce the price of aluminum alloy screens and the selection of aluminum alloy screens.
First, the price of aluminum alloy screens
1. The aluminum alloy screens currently sold on the market are all priced based on the number. The higher ones are priced at about RMB 300-500, and the common ones are about RMB 50-300. There is much difference.
2, the general quality of the inner layer of gauze is about five to thirty yuan per meter, there are special requirements, such as the organ type can be superimposed or have a window or have different needs such as magnetic, the price will increase, About 40 yuan to 100 yuan, the more you sell, the more you will also be more favorable, and some will also require worker installation fees.
Tips: Due to different regions, per capita consumption is also different, the specific price, please consult your local dealer.
Second, the purchase of aluminum alloy screens
1, see the materials
The thickness, hardness, and oxide film of the aluminum alloy screens used in the excellent aluminum alloy screens all comply with the requirements of relevant departments. The wall thickness should be 1.2 mm or more, the tensile strength should be 157 Newtons per square millimeter, and the bending hardness should be as high as 1 mm 2 108 Newtons, oxide film thickness should reach 10μm. If it does not meet the above requirements, it is counterfeit aluminum alloy screens and cannot be used.
2. Identification mark
Manufacturers who meet the regulations or standards will mark the product in the prominent position of their aluminum alloy products. They include the manufacturer's name and trademark, product name, product model or mark, production time or serial number, etc. On the packaging paper of its products, there is a clear "moisture proof", "carefully light" and "upward" font or logo. This is the qualified product.
3, see processing
Excellent aluminum alloy screens, exquisite workmanship, device stress, good sealing effect, easy to open. Counterfeit aluminum alloy screens, workmanship, do not install according to demand, poor sealing performance, the switch is not comfortable. The shoddy aluminum alloy screens are not only prone to leaks, wind and rain, and glass cracking. At the same time, bad weather can easily cause the glass to fall and scratch people.
Summary: The above is a small series of aluminum alloy screen window prices and aluminum alloy screens to buy the skills, I believe we have a corresponding understanding of aluminum alloy screens, I hope the introduction of Xiaobian can bring you help, if you want to know more For more information, please continue to pay attention to this site.
Aluminum alloy screen price
We may have heard of the Dome Fixed Focus Camera / Fixed Focus Dome Camera / Fixed Focus Dome cameras/ Fixed Focus Digital Dome Camera/ Fixed Focus Dome Camera Amazon/ Fixed Focus Dome Camera CCTV, so what is the Dome Fixed Focus Camera? We know that the dome refers to the camera shape, so what about the Fixed Focus? Actually, the Fixed Focus refers to a type of the camera lens. Today let me introduce the camera lens for you.
Last time, I have introduced the camera lens and one classification for you. Today please let me introduce the 2nd classification for you---the classification according to the occasions.
1. The standard lens
The lens with the angle of view at about 50°(which is also the angle that a person can see without turning his head and eyes), is called the standard lens. The focal length of the 5mm camera's standard lens is mostly 40mm, 50mm or 55mm. The focal length of the 120 camera's standard lens is mostly 80mm or 75mm. The larger the CCD chip is, the longer the focal length of the standard lens will be.
2. The wide-angle lens
The wide-angle lens has the angle of view at above 90 degrees, which is suitable for shooting close and large-scale scenery, and can deliberately exaggerate the foreground to show a sense of perspective. The typical wide-angle lens of the 35mm camera has a focal length at 28mm and an angle of view at 72°. The 50mm, 40mm lens of the 120 camera is equivalent to the 35mm, 28mm lens of the 35mm camera.
3. The long focal length lens
The long focal length lens is suitable for shooting distant subjects. The small depth of field can easily make the background blurred and the subject stand out, but it is bulky and the difficult to focus on the dynamic subjects. The long focal length lenses of the 35mm camera are usually divided into three levels, 135mm or less is called the medium focal length, 135-500mm is called the long focal length, and above 500mm is called the super long focal length. The 150mm lens of the 120 camera is equivalent to the 105mm lens of the 35mm camera. The long focal length lens has the telephoto lens design because it is too bulky, that is, a negative lens is added to the lens behind , and the main plane of the lens is moved forward, then a shorter lens body can be used to obtain the long focal length effect.
4. The reflective telescope lens
The reflective telescope lens is another design of the super telescope lens, which uses a reflecting mirror to form an image. However, due to the design, the aperture can't be installed, and the exposure can be adjusted only through the shutter.
5. The Macro lens
The Macro lens can not only do the close-up macro photography, but also do the telephoto.
In conclusion, we can choose rake the angle of the view into consideration according to our needs, when we choose a Dome Fixed Focus Camera.
Dome Fixed Focus Camera
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