UV filters protect against damage to the camera lens.
UV camera filters are an essential part of a photographer's gear. Even with digital camera lenses, there are good reasons to use a UV filter. These simple items have great value at a moderate price. Consider some of the benefits when deciding whether to use a UV filter.
Protection
Camera equipment is expensive, that is why every lens should have a UV filter protecting the glass. UV filters protect against objects scratching the lens and also protect against flying objects (i.e. rocks) hitting the lens and cracking the glass. They also protect the lens from moisture, which can be a problem.
Increase Lens Resale Value
Camera equipment resale value is determined by the quality and condition of the equipment. Therefore, by protecting the lens, UV filters increase the resale value of the lens.
Haze Reduction
UV filtration with film cuts down the amount of haze. On the other hand, digital camera sensors are not as sensitive to UV light as film. Therefore, UV filters are not as important for haze reduction with digital cameras.
Improve Contrast
On a sunny day, UV filters will increase contrast on film. This does not hold true for overcast weather where the UV light is more uniform and evenly distributed. Digital camera sensors are not as sensitive to UV light and therefore UV filters are not as important in this area for digital cameras.
Image Quality
When a UV filter gets scratched or damaged it can be easily replaced. This keeps the image quality consistently high. If the camera lens is left unprotected, damage to the glass will reduce image quality because of minor scratches or nicks. Purchasing a high quality, multi-coated UV filter and keeping it clean will have a minimal effect on the image (if any) and will give the photographer consistent image quality. Multi-coating of the UV filter cuts down glare and the chance of lens flare. High quality UV filters will not have a noticeable colorcast.
Cost
The cost of a UV filter is extremely small in comparison to the cost of a lens. Most UV filters can cost anywhere between $5 to over $150. There are many brands and types of UV filters to choose from. It is much simpler and cheaper to replace a UV filter than an expensive lens.
