What is the effect of a larger lens diameter on camera performance?

• A. It reduces power consumption.
• B. It narrows the field of view.
• C. A larger lens diameter provides a better picture, wider coverage, and better resolution.
• D. It has no effect on image quality.

Answer: (C)

Increasing the lens diameter mainly affects how much light can be captured by the camera. A bigger diameter lets more light reach the sensor, which leads to brighter images with better signal-to-noise, especially in low-light situations. That extra light also helps reduce diffraction blur at a given exposure, so fine detail can look sharper and the overall image quality can improve. However, the field of view—the area of the scene captured—depends on the focal length and the sensor size, not the lens diameter, so simply making the lens wider does not automatically widen coverage. The idea that a larger diameter yields a better picture and better resolution reflects these real advantages in light gathering and sharpness, even though the claim about wider coverage isn’t inherently tied to diameter.