What problems should I pay attention to when learning to shoot video with SLR?

Lead: For many movie friends, it may not be difficult to shoot a successful work with a camera, but it may not be so simple to record a wonderful movie. After all, static photography and dynamic video are different in nature, and the shooting skills will be different. Let's take a look at the technical points that should be paid attention to when using the camera for dynamic recording!

Exposure: the Difference between Instantaneous and Persistent

Generally speaking, as far as we know, in still photography, the exposure is determined at the moment when the shutter is released. Even if you need to fill the light, you can also use the flash to assist. Dynamic video generally emphasizes constant exposure. Unless special effects are created, there will be no obvious exposure change in the film scene, otherwise the flickering visual effect of the film may not be very good.

Choose the right shooting mode

In order to control the settings in the camera and achieve a stable exposure effect, it is recommended to use manual mode when choosing the shooting mode, because there are uncontrollable factors in automatic, aperture priority and shutter priority modes, and only in manual mode can the parameter settings be fully mastered, which is less affected by environmental changes.

Calculation method and selection of shutter number

Shutter speed is one of the parameters to control exposure, and it can also determine the fluency and effect of the film you shot during video recording. As for 24p, which is commonly used in making movies, how many shutter values are set before shooting? If you want to clearly shoot every movement and behavior of the subject, you can set the shutter number to twice the number of frames, that is, if the number of frames is 1 sec, you can increase the shutter speed to 1/50s, which is safer, but if you pursue the afterimage effect when the object is moving, you can reduce the shutter speed. After setting the shutter number, try not to change it at will during shooting.

Aperture determines depth of field

In photography, the aperture size can not only control the light entering the camera, but also use the large aperture to create a beautiful shallow depth of field to highlight the theme. Whether you choose a large aperture or a small aperture, it is still not recommended to change the aperture size when shooting. It's best to pause adjusting the value, even if you are using a film focusing lens with stepless aperture and zoom ring. Of course, this kind of lens is very suitable for shooting, especially when zooming manually, and it is easier to shoot the feeling of focus shift that is common in movies. It is also smoother when zooming.

On ISO value in dynamic video recording

The choice of sensitivity determines the details of the film picture, similar to still photography. When your sensitivity is higher, the graininess or noise is more obvious. As with the first two parameters, it is best not to change the ISO value when recording, so as not to affect the whole exposure.