1. They have a bigger aperture size
Prime lenses are faster, and offer a much wider aperture, like f1.4, f1.8 or f2. To compare, most zoom lenses are limited to f2.8 or slower. This is a huge advantage, especially if you’re working with low light - which many street photographers do. A good prime lens will increase the effectiveness of your camera’s autofocus so you end up with crisp photos. It’ll also bring out the detail in your images, even if you were shooting in a dark, moody nighttime setting.
2. They have an excellent image quality
Since prime lenses have a single focal length, there are fewer “moving parts.” As a result, they’re known for producing sharp, high-quality images.
3. They’re smaller and lighter
While you can prepare for a shoot, you often never know where a scene will take you. Prime lenses tend to be less bulky than their zoom counterparts, so they’re easier to carry around.
4. They can produce bokeh
If you want to create that beautifully blurred effect, a prime lens will help you to get there - and it’s all thanks to the wide aperture.