In case anyone is not aware of the aspects that determines the intensity of the sharpness of parts of a photo (usually the backdrop), here are 4 things we need to take note of.
The size of the aperture
Aperture opening size determines the depth of field of a photo. It is a common saying and most beginners even know that a fast lens with the biggest aperture you can get is desired for portrait work and throws the background out of focus so that attention is locked and given to the subject.
The distance between the subject and that of the backdrop
Another way to achieve the shallow depth of field and a blurry backdrop is to angle your shot in such a way that the backdrop is cleared of obstructions and you have a greater void of empty space between...
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