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The so-called infrared camera is actually an image sensor that can sense invisible light beyond the red wavelength, that is, infrared. Ordinary film is not sensitive to infrared rays, so there are specific infrared photographic films, which are strictly controlled, because it is easy to shoot the perspective effect.
In the digital era, CCD CMOS can be fully sensitive to infrared, so a filter is added in front of CCD CMOS called a low-pass filter, which is to filter out infrared, that is to say, as long as you have strong hands-on ability, you can do it yourself if the low-pass filter is removed, and then to put it bluntly, all digital cameras (except Leica M9) are now converted into infrared cameras.
But in addition, keep in mind that the infrared focus and the visible light focus are a little different, the old lens has a red dot that is used to make compensation when the infrared focus, the current lens basically cancels this design, but it is not difficult to find, just try a few more times to make a mark yourself.
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Hehe, to put it simply, it is to remove the low-pass filter in front of the camera's CCD, so that it becomes an infrared camera.
However, after this change, you need to add an infrared filter to the front of the lens, and there are about three models, which are used in strong sunlight, under light, and in low light.
In addition, it is necessary to correct the focus, because the infrared wavelength is the reason why the focusing distance should be slightly back.
That's pretty much it.
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The principle of D40X to infrared camera is the same as that of D50, which can be referred to, but it is slightly different in disassembling and assembling the camera.
However, after that, the camera can no longer be used as a regular camera, but only a special infrared camera.
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Judging by your needs, I'm afraid you're going to be disappointed.
It is true that it is possible to change a normal digital camera to an infrared camera.
The principle of its transformation is:
In fact, the CCD and CMOS of digital cameras are also sensitive to invisible light (including infrared).
In order to prevent both visible light and visible light from being sensitive to the CCD (CMOS) and affecting the image quality, all digital cameras have a low-pass filter in front of the CCD (CMOS) to filter out the invisible light (infrared).
When transforming, as long as you remove this low-pass filter (mostly only through violent methods, it is difficult to remove it completely), and then add a dark red filter in front of the lens to filter out visible light as much as possible, and only allow infrared rays to pass through, so that an infrared digital camera is transformed.
However, after all, the intensity of natural mid-infrared rays is much lower than that of visible light, and CCD (CMOS) is mainly designed for visible light sensitivity. Therefore, the infrared ability of the infrared camera modified in this way is also very low.
You can use visible light + infrared light at the same time to sensitize light without adding a red filter, and the result is just a strange color.
As in the movie, the pure infrared image obtained requires the design of a special infrared imager.
Not only does it only receive infrared rays, but there is a special infrared amplification circuit in the machine, so that it is possible to get the kind of thermal imaging pictures seen in the movie.
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What camera are you using? If you want infrared imaging with a general camera, it seems that it cannot be used normally......If you feel that the image is not good at night, you can turn on the night mode, or low-light portraits
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If you change to an infrared machine, you won't be able to shoot normally;
To disassemble the camera, remove the low-pass filter and the thermal lens from the inside, and then attach the IR filter to the outside.
If you only install an infrared filter, then the light sensitivity is very low, and there is no image unless it is a long time**.
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Replace the lens of the camera with an infrared lens.
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I have tried the methods in Jin Zhouyuan's textbook a few times, and it is roughly twelve or thirteen steps, and my impression seems to be quite good
It doesn't have to be modded, does it? Maybe people just added an infrared filter to the lens
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Infrared coating is enough for the lens. However, infrared coating is difficult to buy because it is a restricted product.
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Infrared photography? It seems that it can't be achieved by the general camera, you shouldn't be in a hurry to buy a filter, the general digital camera must put a filter in front of the CCD (note that it is inside the camera, it is a square filter, not a filter outside the lens) to take away infrared photography, some cameras (such as Sony's has a camera) have their own infrared photography function, in fact, it is to add a mechanical part on top of this filter, and remove the filter when using the infrared function. Many people use outdated digital cameras to transform into infrared photography machines, and it is basically impossible for D60 to be transformed without transformation, so it is more complicated and not suitable for transformation.
The color of infrared photography is very strange, it is a monochrome, there are also colors, it can penetrate some relatively thin objects, and it has a night vision function, if you have to shoot, you can only buy a special night vision infrared goggles for this model, and maybe you can add the camera to the back.
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You can remove the infrared cut-off filter in front of the CCD and remove the glass of the same specification as the cushion block.
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No, the retrofit space is too narrow to add an infrared sensor.
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If the camera's sensor does not support infrared light sensitivity, or does not support video, it cannot be transformed into a true infrared camera. If it does, it is to turn on the camera in infrared mode.
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If the camera itself has a camera function, buy an infrared lamp and turn on the infrared lamp while taking pictures.
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If you go to TB to search for infrared modifications, there will be a lot of them.
Nikon D40 set of current market ** is 3200 yuan, Tamron 70-300 lens ** 1250 yuan, second-hand may need to discount half price = 3200 + 1250 = 4450 half discount 2200 or so, change Nikon D80 set with 18-135 head now** 6200 or so, 6200 - your 2200 yuan may need to make up the difference of 4000 yuan, so it is not cost-effective to replace the new, it is recommended that you sell second-hand, Then buy a new machine from the new, maybe you can spend less RMBB The above analysis is for reference only and is not used as the basis for the transaction.
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