> What photographers know about the photo ashing technique?

the photos taken by SLR are "gray", which can be improved by adjusting the "contrast" in the style parameters of SLR. "Gray" is caused by the small contrast of the picture, so it is enough to improve the contrast of the picture. In order to take photos with different expressive force, SLR sets the "style" parameter. You can adjust the contrast, sharpness, hue and saturation. Adjusting "contrast" can improve the contrast of the picture and solve the problem of gray.