Table of Contents
The Impact of a UV Filter on Image Quality
A UV filter is not designed to alter the image.
The term “UV” stands for ultraviolet. A UV filter is therefore not just a simple piece of transparent glass.
It blocks ultraviolet rays that could potentially degrade image quality from reaching the sensor.
However, while a UV filter could improve image quality with older lenses and film photography, advances in anti-reflective coatings on modern lenses and digital sensors have made the image quality benefit virtually nonexistent today.
Protecting the Lens
In general, to get the most out of a lens, photographers avoid placing a filter in front of it that could potentially reduce image quality and instead let the lens perform on its own.
However, certain weather conditions (rain, sand, sea spray, etc.) can damage the lens.
In such situations, using a UV filter becomes worthwhile, as replacing a filter is far less expensive than replacing a lens front element.
Conclusion
A UV filter is not meant to improve image quality, but rather to protect the lens.
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