Inscription: This year plans to write a series of posts on "deeply interpreting projectors", just like last year to write deep interpretation of telescopes.
壹◉ Purchase reasonIn the depth of the living room space, and in order to protect the child's eyes, the family has been using 32-inch small TV. But recently the child had a vacation, grabbed TV, so he wanted to buy an emergency device and he would. Later, I saw the 399 yuan spike clear the United States and Q7 standard projector, the price is only one-tenth of the big business projector, compact, compatible 1080p3D, can put 100-inch big screen, so I bought it on a whim.
Qing Hua Xun Q7 projector small office mini LED home projector 1080p3D HD projector projector home official standard 489 yuan spike 399 yuan Jingdong direct link Compared with the standard models, there is a package version, an increase of Android WIFI function, you can connect with mobile phones, tablets and other wireless connection, to achieve the same screen put ~ ~ ~, but the price is also a lot of expensive.
QINGXING Q7 projector small office micro LED home projector 1080p3D HD projector projector home home smart version 779 yuan Jingdong direct link appearance display 1, packaging and accessories Goods go Jingdong logistics and distribution, parcels are fairly tight, cash on delivery, no traces of bumps when sending ~~~~, the side of the box with a label indicates that this is the standard version, that is, does not support the WiFi function, in fact Does not support WiFi, Bluetooth does not support ~ ~.
Fortunately, the projector interface is more abundant, and the given cable supplies are given, in addition to the host, remote control, power cord, manual, but also to the HD line, VGA cable, AV cable ~, red and blue 3D glasses ~
The overall host is white, workmanship feels so-so, support infrared remote control function ~~~
In the figure below, the red area in the middle of the VGA and AV interfaces on the back of the host is the infrared remote control receiver.
The overall weight of the host 1kg, the volume is not large, the overall relatively lightweight ~~~~
On my Benoy AF18+ tripod use is still stable ~~~~, but is the bottom screw holes need to be padded to secure tight ~~~.
From the beginning to learn photography articles three: # # The first sun Beno tripod AF18 + unpacking inscriptions in mind: Since buying the camera and lens, buy a tripod on the agenda. A few days ago, participating in Jingdong photographic equipment full 500 minus 150 activities, started the BENO BENROAF18 + this tripod. Before the purchase, how much I hope to be able to look at the value of friends at the Aunt Zhang's sun list, to understand what the product has advantages and disadvantages, but unfortunately and Zhang Aunt's home has not sunk through this matter, only the discount broke. So after the arrival of goods is to take pictures, test, find hair habits oh | Like13 Comments11 Collection26View details The lens can be focused by manual stretching. The nearest focusing distance is about 1.2 meters~~~, and the clear projection size is about 1.6 meters*0.9 meters at 2 meters. For the price of 399, manual focus completely does not have the feeling of the camera manual focus ring, but still smooth ~ ~ ~ can not feel the presence of frame ~ ~.
There is a coating on the lens, which is specifically made up of groups of several tablets, but the outer lens is no doubt the optical lens.
Of course, the realization of the projection, 399 price also means that the control on the shrink, such as screen correction function, our common commercial projector is through the remote control can be achieved two-dimensional trapezoidal, trapezoidal, curved surface correction and other functions, but this Only vertical manual trapezoidal correction is supported, and the maximum correction is pitch 15 degrees~~.
For desktop use, the elevation angle ~~~ can only be adjusted by screw, and after adjustment, the individual feels that the screen is not level. This may be due to the large gap of the adjustable support thread and the reason that the weight of the machine is concentrated on the lens side~~.
The following is a close-up of the product's bottom, back and side vents ~~~~ Personal feel fan hot is okay, that is done a little dust-proof, the table is worried ~~~~
1, display effect
For the projector, the display effect is the most critical, and there are three main parameters related to the display effect: brightness - the unit is lumens, the greater the dynamic value the better; contrast - the ratio, the larger the ratio the better; resolution - this does not Explain and cell phone resolution one thing, the higher the better. However, this kind of micro projector does not use the measurement method of the traditional projector, a measurement method one by one, so these values ​​are mostly relative values, their own standards ~ ~, compared with other brands does not make much sense. This product nominal: 3600 brightness (luminance itself is not a unit), 12000:1 contrast, 1024 ✕ 768p, are very abstract data, then look at the actual effect.
â–¼ The following is the contrast between the display of the two 35-watt fluorescent tubes and the TV. It can be seen that the picture is very gray ~ ~, there is no sense of experience at all. So don't expect this 399 product to watch videos during the day, unless your home's curtains are well shaded and you can create black nights during the day.
â–¼ The following is the effect of opening a single 35-watt fluorescent lamp, the basic look ~ ~ ~, and see the brightness of the picture posted on the wall is almost ~ ~ ~, personal understanding of this should be better than the TV to protect the eyes ~ ~ ~ ~.
â–¼ The following is the effect of not turning on the light to see, if the light is not open, the brightness is acceptable, the contrast is also okay, more comfortable than the TV ~~~
However, it should be reminded that this is not used as a commercial projector, especially for displaying form documents, etc., because in actual use, it is found that since the lens system is a cheap system, the edges are blurred when the middle of the image is clear.
This kind of situation can't be seen when watching videos because your eyes are always focused on the center of the screen, but when you look at the words on the edge, the virtual focus is obvious ~~~. This kind of problem is in the price range of 2,000 yuan to 3,000 yuan. There is also a ~~~ end-focus projector, but the latter is more similar to the principle of a large focal length of the camera to produce the background blur ~~~.
There is also the problem of resolution. The so-called maximum resolution supported by projectors is generally not the output resolution (original resolution). The original resolution is the most critical ~~~. The following is the picture of the video played by the close-up viewer. , you can see the presence of sawtooth ~ ~ ~. Personally I think it is still acceptable. I can't see jaggies if I look at the 2-meter position.
Since the interface is very rich, the landlord tried it out one by one. I feel that multi-interface support is actually the best feature of this low-end product with minimal shrinkage.
â–¼ Through the AV cable and the limited TV connection, there is no pressure, the dynamic effects of the various channel display is very good ~ ~ ~ no TV brightness is high, but the definition can be.
â–¼ connected with the TV box, this is also very convenient, even on the selected high-definition source, can be achieved immediately ~ ~ ~.
â–¼ connected with the computer, HD line, VGA line have tried, poor experience is the document operation, the video can also be ~ ~
â–¼ and U disk connection, can not plug and read, and the TV plug U disk effect is similar, you need to multi-step operation to enter the playback interface, reflecting the speed of general ~ ~ ~.
â–¼Connect with the audio, need to remind: The biggest weakness of this projector is poor sound quality, if you do not connect the sound, the sound is particularly harsh, low and will be submerged in the sound of the fan, so it is basically to connect the sound, However, the standard model does not support the Bluetooth function, so you can only use stereo audio connection ~ ~ ~.
Support red and blue 3D movie playback, but only support, the actual use of poor results do not want to see ~ ~ ~, the reason is very simple, this device is originally a portable device, the actual brightness is low, the contrast is not high, wearing red and blue 3D glasses will The light that enters both eyes is reduced by half, so in actual use, the darkness of the field of view is severe. Only in the case of a complete black light, it is barely able to see ~~, but it is very troublesome.
The four advantages of this product are summarized as follows:1, cheap, a few hundred dollars ~ ~ ~, when the toy can be bought for children occasionally play cartoon play ~ ~ ~.
2, put the screen larger, suitable for the best quality of silk is not high to start.
3, the interface is relatively rich, you can connect a lot of equipment ~ ~ ~, in addition to cable TV, TV box, computer, mobile phone (Wifi version support), tablet (WiFi version) support, you can also use the camera, video camera and other video output line ~ ~ ~, output monitoring video ~ ~ ~, it is strongly recommended not to peep on the floor sister ~ ~ ~.
The biggest drawback of the product: (In fact, the common problem of the projector, but this low-end equipment is more obvious illness)1, the brightness is a bruise ~ ~ ~, not available during the day.
2, poor sealing, easy to enter the gray, the landlord has found that there are two large gray spots, in the 160cm * 90cm screen, the gray point length 1cm ~ ~, may be the reason for the internal optical system is not a good seal.
3, expressed concern about the service life, business is said to be 50,000 hours of life, this standard is a bit exaggerated, although the LCD than traditional light bulb projector life is long, but it should not be so good.
Well, this article is original here, right quote, next, I will talk projector technical parameters and product purchase knowledge, welcome everyone to pay attention to me.
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