With regards to UV filters, it’s a long debated issue. Here are three pro viewpoints on the issue.
1. Matt Granger:
2. Here’s The Camera Store’s own Chris Nichols discussing lens hoods.
3. Lastly, here’s a video from DigitalRev where they too discuss using a filter vs going without.
What’s the final verdict? Don’t waste your money on a UV filter. Instead, use a lens hood for protection.