Which camera accessory consists of pieces of colored glass placed in front of the lens to prevent stray light from entering the camera?

• A. Aperture
• B. Filter
• C. Lens hood
• D. Shutter

Answer: (B)

Filters are camera accessories made of glass (often colored) that you place in front of the lens to shape the light entering the camera. By absorbing or blocking certain wavelengths, filters adjust color, contrast, and exposure, helping to control stray light and prevent unwanted color casts or glare. An aperture is the adjustable lens opening that governs how much light hits the sensor and affects depth of field, not a glass piece placed in front of the lens. A lens hood shades the front element to reduce stray light from the sides but isn’t made of colored glass. The shutter controls how long light hits the sensor, again not a glass filter.