• A lens is a device that directs light to a certain focal point. The lens in a film camera directs light to the film strip, whereas the lens in a digital camera (such as DSLRs or mirrorless cameras) directs light to a digital sensor. Convex (curved outward) or concave (curved inward) glass plates make up camera lenses (curved inward).
• Prime optics. Because prime lenses have a fixed focal length, they are faster and sharper. While prime lenses are less adaptable because of their fixed focal length, they are also quick and light, making them convenient to travel with.
• Zoom lenses use a set of lenses to provide varied focus lengths from a single lens, making them more versatile yet slower. They have more glass, which helps them be more flexible, but they are also larger and heavier than prime lenses.

Read More: What type of cards does camera takes?