What is one disadvantage of absorption filters?

Absorption filters have the characteristic of absorbing certain wavelengths of light while allowing others to pass through. This inherent property makes them susceptible to scratching, especially when they are made from materials like glass or plastic that can be more easily damaged. When scratched, the effectiveness of the filter can be compromised, resulting in a change to the color or intensity of the light that it transmits.

In contrast, the other characteristics mentioned do not directly relate to the primary disadvantage of absorption filters. For example, the ability to mold filters is a separate consideration not directly tied to the absorptive qualities, while impact resistance is generally a property to be valued rather than a disadvantage. Additionally, while some absorption filters can block UV light, this is considered a beneficial feature rather than a downside. Therefore, acknowledging the susceptibility of absorption filters to scratching provides a clear understanding of their limitations.