Let's first talk about how lenses coincide with camera models. You must always know what series camera you own before you go purchasing just any lens. The compatibility will be listed either on the camera maker's website or on the boxes of the lenses themselves. If you're unsure you could always ask the store for assistance.
Lenses are an investment like any other professional photography equipment. You can find them at better prices online, but generally they will cost around $100 and upward. Be sure you know which ones you really need the most, then purchase them in order of importance.
Lenses are made for specific goals, here's a rundown of the benefits of each:
- Wide angle lenses are good for landscapes and open spaces. They can distort the corners slightly into a curve depending on their degree.
- Telephoto lenses are fantastic for narrowing the depth, say for sporting events where you need close shots.
- Fisheye lenses greatly distort the image. They're useful to create an exaggerated shot.
- Polarizing filters and UV filters help adjust lighting and reflection problems experienced by the camera lens.