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crwdns2933797:0CHUNYU SHENcrwdnd2933797:0crwdne2933797:0
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| + | [* black] Then you need to turn the wave wheel at the handle of the camera body. You need to make the aperture smaller, so you need to wave to the right. Specify the F value to 16 (remember, the larger the aperture, the smaller the F number) |
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| + | [* black] Then you need to press the shutter against the wall (or any white background). But after you take a picture, if your camera sensor has dust, the picture is stained (the meaning of this step is to confirm the location of the stain) |
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