lens speed

Lens speed refers to how well a camera lens can gather light, which affects its ability to capture images in low-light conditions or achieve a shallow depth of field. It’s often indicated by an f-number, such as f/2.8 or f/1.4. A lower f-number signifies a "faster" lens that lets in more light, enabling quicker shutter speeds and better performance in dim environments. Conversely, higher f-numbers mean a "slower" lens, requiring more light or longer exposure times. Faster lenses are valuable for capturing sharp images in challenging lighting, while slower lenses may be lighter or more affordable.