Pitfalls of Cheap Camera Lenses
Cheap camera lenses can be inviting for people who do not understand optics or for those who have very little knowledge about why lenses are used in a camera. Below is the importance of these lenses and the disadvantages of buying cheap ones.
How a Lens Works
Lenses are used because light travels through them more slowly than through air, causing refraction. There is something called Chromatic Aberration, a phenomenon in which the lens or glass bends the various colors in the light; these colors are all bent by different amounts or degrees. If all the colors meet at a single focus point, the photo turns out great. This is where you will see the difference between a good lens and a cheap lens. With a cheap lens, there is distortion in the point of focus, where the colors are supposed to meet. This gives rise to the unwanted 'Halo' effect on pictures.
A low quality lens can be easily scratched, cracked or broken. A scratched lens or smudged filter can destroy the quality of any image, no matter how many other parameters you set. It is therefore important to invest your money in an expensive lens rather than an inexpensive one. Mostly the smudged surface and the scratches affect the manner and amount of light that enters into the camera. This affects the quality of the final output.
Cheap camera lenses are often not durable enough; they are made of low quality glass, which will only further distort an image.