What is Prime Lens? What are the advantages?

What is a prime lens or fixed lens? Prime lens is a lens that has only one focal length. Examples of prime lenses is the Canon 50mm f/1.8 lens, Nikon 35mm f/1.4G, 20mm f/2.8 Canon EF 90mm f/2.8 or Tamron Macro lens.

All lenses have only one single focal length lenses are called prime or fixed, as opposed to a zoom lens that has a focal length of many points. If you only have one prime lens focal length zoom lens while having a lot of focal length, then what are its advantages?

Some Prime Lenses Features
Some properties below is a generalization, because there are certain prime lens may be defective or does not match the expectations of quality or more expensive. However, the majority of prime lenses bearing the following properties:
1. Size and Weight, prime lenses have a small physical size, lighter and more compact. With only one point focal length, the prime lens should not have the intricate mechanical construction so that the shape and size more efficiently.
2. Quality, prime lenses tend to have very good optical quality. Manufacturers make prime lenses and just had to focus how to produce the best image quality at the focal length.
3. Price, prime lenses are usually more affordable in price because it has a mechanism construction and simpler than zoom lenses. No need to move elements at zoom in zoom out.
4. Fast lenses, prime lenses usually have a very wide maximum aperture so as to gather a lot of light. Qualities that make prime lenses are called fast lenses because we can use a higher shutter speed while maximizing the aperture. Wide aperture also makes brighter viewfinder.
5. Bokeh. One of the most sought-after characteristics of the prime lens is the quality of the resulting bokeh this lens. Because it has a large maximum aperture, the quality of the bokeh will be more okay. Read tips to make bokeh photos here and here.
6. Zoom In legs, prime lens spur us to be creative. With no zoom feature, then we are forced to foot and think harder when composing a photograph. Many argue that this could spur our creativity when taking pictures.