All the following photographs were shot using a 50 MM prime lens. No zoom here so if I needed to be closer, or further, it was zoomed with the feet.
Besides making you think and plan a little more a prime lens will always be crisper than a zoom. In addition the f stops will be wider.
The wider f stops allowed me to get this reflection in the window.
And the ship here in the gallery across the street.
A prime is also limiting if you don’t have space, or angle, to get the right shot. The images here were from the same street location in the French Quarter of Charleston, South Carolina. The streets are narrow, sometimes busy, and options for moving around limited.
A 50mm lens is not expensive (a third party lens like Yongnuo about $ 50.00), and small. It takes up no room in a bag.
For real work outside it will not replace my zooms. But if you are shooting portraits or a subject that is not moving/changing it’s a great option.