Portrait Photography Tips (lenses)
A good portrait in photography, videography or painting draws attention to the subject. It can be achieved through some combination of composition, lighting, with colors, playing with the depth of field...
Canon EOS 700D, Canon 50 mm - f/1.8, 1/125sec, ISO 100
Portraits are about one thing: the subject (of course). Technically in portrait photography the camera does not matter that much, but what is more important is your camera lens.
If you would like to get that shallow depth of field on the picture, prime lenses are recommended. Prime lenses have wide apertures of f/2.8, f/1.8 or even f/1.4 , f/1.2. The large apertures let in more light. Most portrait and street photographers will often use prime lenses in their work because it gives them the ability to isolate their subject from the background.
If you use a kit lens to your portrait photography it does not mean you can not make a good portrait with it. No, of course you can, but you have to decide what kind of images you want to produce, and what kind of lenses will help you achieve that. If you settle with portraits I highly recommend to invest at least in one prime lens for the future.
Popular prime lenses among the photographers are the 35mm (it is wide enough on tighter places - very useful for street photographers for example), 50mm (if you are a bokeh fan and you like to play with the depth of field - most portrait photographers have it), 85mm (it is a more bokehlicius lens and you need a bit bigger distance from you model).