About the depth of field effect of photography, I hope professional experts can solve it!

Three elements of shallow depth of field: 1, and the aperture should be large; 2. Close to the prospect; 3, the focal length should be large; Card machine may not meet the requirements, SLR and card, the principle of photography is similar, but the equipment is different. However, if you shoot this natural effect, I think it is better to use a SLR. If it's ps, it's a little troublesome to do gradient blur. The attachment has been adjusted, and the effect is harder than yours, but you can have a look.