How to shoot the product clearly?

1. tripod. Many articles on photography technology suggest that photographers should pay attention to the use of tripods, and no element has such a great influence on image quality. But if you use a tripod, you must use a high-quality tripod, and don't play the wishful thinking of "replacing the high-end tripod with a cheap tripod." The tripod with high cost performance, each leg can be opened independently, with reasonable weight, stability and reliability, and convenient use. With a high-quality tripod, you have to have a matching tripod. The tripod is stable, the tripod is unstable, and the whole system is still unstable. A good pan-tilt should not only be stable enough, but also be able to load and unload quickly, which is suitable for all kinds of subjects. When using a tripod, it is best to only rise to the necessary height. Unless absolutely necessary, it is the last choice to raise the center column, because the center column is not a triangular braced stable structure, which greatly increases the unstable factors. In addition, in windy weather, it is best to reinforce the tripod with heavy objects.

2. Shutter speed. Don't be fooled by the bright sunshine, please remember the basic rule of hand-held photography: the shutter speed is the reciprocal of the focal length of the lens. Of course, this is a rule of thumb. If you want to get high-definition photos, you need a higher shutter speed. Even every time the heart beats, the flow of blood in the body will cause hand tremors. Most photographers don't think that heartbeat will affect the imaging quality, but according to relevant calculations, the pulse will cause a displacement of about 0.2 mm, so the shutter speed should not be lower than110 second at least. If you use a high-quality lens with a resolution of 100 lpm, if you use a shutter speed of 1/250 seconds for hand-held photography, even if the displacement is 0.2 mm, its resolution will be reduced to 78 lpm, with a resolution loss of about 22%. If the shutter speed is further changed to 1/60 seconds, the resolution is only 30 lpm. Therefore, don't believe that a 60mm Nicole macro lens for hand-held photography, with a shutter speed of 1 /60 seconds, can take photos that are enlarged enough to be more than 10 inch. Many times, the sharpness is not enough not only because the camera is moving, but also because the subject we shoot is moving, such as the branches blown by the wind, the people on the stage and so on. In this case, even a tripod can do nothing, and a faster shutter speed is needed to ensure the clarity of the picture.

3. Cable release. Don't think that putting the camera on a tripod will be done once and for all. You know, no matter how light the shutter is, it will cause vibration. The problem of machine vibration can be minimized by using cable release and pre-lifting function of reflector. If there is no cable release, please take a selfie with the camera instead. Although it is not as good as cable release, it is still much better than touching it by hand.

4. Focus accuracy. Although the scenes in the depth of field are within the clear range acceptable to the eyes, if you enlarge the photo, you can still see the sharpness difference between in-focus and out-of-focus, so if you want to get satisfactory sharpness, don't just focus because the depth of field is large enough. There will always be errors in autofocus. If time permits, manually focus on the topic you want to express most.

5. Use the best aperture. The resolution and sharpness of each aperture of a lens often vary greatly, sometimes by one or two apertures, and the sharpness is like a world of difference. Using the "best aperture" of the lens is an important means to improve the sharpness. Generally, the best aperture of a lens appears in the middle aperture, and the imaging with large aperture and small aperture is not good. For example, Nikon 16-85mm F3.5-5.6 lens, the best imaging is in F8- 1 1, while the middle aperture of large aperture lens is smaller, and the optimal aperture is smaller, for example, the optimal aperture of 50/F 1.8 is in F5.6, and the top zoom lens. However, although the small aperture has a large depth of field and the center and edge of the image quality are relatively uniform, the resolution will be worse than that of the large aperture because of the serious diffraction problem. Therefore, in order to ensure the clarity of the image quality, we should try to avoid shooting with the minimum aperture.

6. lens. If you do well before 5 o'clock, I believe that you can get photos with good definition in most cases. But if you have professional needs, don't forget to buy professional lenses-although they are often not much better than ordinary lenses, what you need to improve now is the last 5%. As mentioned above, except for the maximum aperture and the minimum aperture, almost all apertures in the middle of the top zoom lens can be called "optimal aperture", which allows you to consider the depth of field you need more when shooting, rather than balancing depth of field and imaging. Top-level lenses also have better color reproduction and distortion control than ordinary lenses. Although color can have anything you want in the digital age, and it is easy to correct distortion later, as a professional, will you waste precious time on it? 30 minutes per photo, hundreds of photos, how long do you need? In addition, the top-level lens can show the advantages of image quality and noise under long exposure and low light because of its good quality and better transmittance. Larger aperture, better lens seal and reliability are all well-known advantages of top aperture. If you are a professional photographer, then I believe that the top lens will definitely save you more money than the lens value.