How does a SLR camera blur the background? What does a large aperture mean?

1, the larger the aperture, the better the blur; \x0d\2。 The longer the focal length, the better the blur; \x0d\3。 The closer the subject is, the better the blur; \x0d\4。 The more blurred the background, the better; \x0d\5。 The larger the CMOS size of the camera, the better the blur effect. \x0d\ The above are the elements of background blur. If you want to shoot a film with a blurred background, you must follow the above principles. \x0d\ Large aperture generally refers to the aperture above F2.8, so this kind of lens is very expensive to sell. \x0d\ If the focus is fixed, the aperture can be larger, generally above F 1.8 (excluding telephoto focusing).