Arguments FOR Clear/UV Filters:
* Protection: This is the primary argument. A filter acts as a sacrificial layer, protecting the front element of your expensive lens from scratches, dust, fingerprints, and accidental bumps. Replacing a damaged filter is much cheaper than replacing or repairing a lens element.
* Peace of Mind: Knowing that your lens is protected can give you peace of mind, especially when shooting in challenging environments like beaches, deserts, or crowded areas.
* Cleaning Convenience: It's often easier and safer to clean a filter than the delicate front element of your lens.
* Resale Value: A lens in pristine condition will generally fetch a higher resale price.
* UV Filtration (Limited): Older films and some digital sensors could benefit from UV filtration, but modern lenses and digital sensors have coatings that already block most UV light.
* Weather Sealing: In some cases, a filter can add a slight layer of protection against moisture and dust entering the lens. (Only when used with a weather sealed lens)
Arguments AGAINST Clear/UV Filters:
* Image Degradation: Any additional piece of glass in front of your lens can potentially degrade image quality. This can manifest as:
* Reduced Sharpness: Especially with cheaper filters.
* Increased Flare and Ghosting: Particularly when shooting into the sun or bright lights.
* Reduced Contrast: Some filters can slightly reduce contrast.
* Cost: Even decent quality filters can add a significant expense, especially if you have multiple lenses.
* Unnecessary for Modern Lenses: Many modern lenses have robust coatings that are already resistant to scratches and smudges.
* Misplaced Confidence: Relying solely on a filter can lead to carelessness. Proper lens care and safe handling are still essential.
* Filter Size Proliferation: If you own multiple lenses of varying filter sizes, you need to buy filters in each size to protect them all, which can become a substantial added expense.
Key Considerations:
* Filter Quality: If you choose to use a filter, invest in a high-quality one from a reputable brand (e.g., B+W, Hoya, Marumi, Breakthrough Photography). Cheap filters can significantly degrade image quality. Look for filters with multi-coating to minimize reflections and flare.
* Shooting Environment: If you frequently shoot in harsh environments (beaches, deserts, construction sites), a filter might be a worthwhile investment.
* Personal Risk Tolerance: Are you prone to accidents? Do you value peace of mind over potentially minor image quality differences?
* Lens Cost: The more expensive the lens, the more you might want to consider a filter for protection.
* Lens Hoods: Lens hoods provide excellent physical protection from bumps and also improve image quality by reducing flare. Consider a good lens hood as the first line of defence.
Alternatives to Filters for Protection:
* Lens Hood: Always use a lens hood. It provides excellent protection from bumps and scratches, as well as reducing flare.
* Careful Handling: Practice safe lens handling. Avoid touching the front element, and always use a lens cloth to clean it.
* Lens Caps: Always use a lens cap when the lens is not in use.
* Proper Storage: Store your lenses in a safe place when not in use.
Conclusion:
There is no definitive answer, but here's a general guideline:
* Most photographers don't *need* a UV or clear filter for protection. Modern lenses are quite durable, and careful handling and a good lens hood are often sufficient.
* If you frequently shoot in harsh environments or are particularly worried about damaging your lenses, a high-quality filter can provide extra peace of mind. Choose wisely and be prepared to spend a bit more for a good one.
* If you prioritize absolute image quality and are confident in your lens handling skills, you may be better off skipping the filter.
Ultimately, the decision of whether or not to use a clear or UV filter is a personal one. Weigh the pros and cons carefully based on your own needs and priorities.