What should I pay attention to when shooting a color gradient lens?

When using a color gradient lens, the most taboo is that the picture is worn, leaving traces of filters that are easy to find. For example, when it is cloudy, use a sunset mirror to simulate the dusk effect. The sky was originally of equal brightness. After using the sunset mirror, there will be warm colors in the upper part of the picture and no warm colors in the lower part. This kind of behavior is called a blunt atmosphere. Only when the shot scene is close to the scene you want to express can it be enhanced with a gradient lens. Or a clear dividing line is formed on the same day, and a special atmosphere can be realized with a gradient mirror or even a field mirror. Second, gradient lenses are mostly used in backlit scenes. In the backlight scene, the upper part of the original image is bright, and the normal brightness ratio can be obtained after darkening by the filter. The dark foreground with some backlighting can better hide the traces of the filter when backlighting. If you don't use the material under the backlight, the top of the picture will appear dead black, which is also a manifestation of the stiff atmosphere. Third, the gradient lens is an effect filter. When using the effect filter, try to use a large aperture to reduce the sharpness of the picture. If you use a small aperture, the picture definition is too high, and it is easy to find filter traces. Finally, when using the color gradient filter, we should constantly adjust the shooting angle or filter position to find the most natural performance opportunity.