fmw
No longer a newbie, moving up!
Actually that's the hard part. There are so many out there that are made by a manufacturer and will put what ever name you want on it. Ebay, Amazon, even some of the larger online photo stores sell them under many different names. Especially in those kits full of ultra cheap gear to make them look like good deals.Not everyone uses optical glass in their filters. And not everyone multi-coats them with something that actually works! A piece of bad glass with bad or non-existant coating can and will ruin pictures.Have any of you done any tests to discover degraded image quality from UV filters? I have and I didn't encounter any. By the way I have tested both cheap and expensive filters. My conclusion is that the expensive ones are overpriced. A UV filter is nothing more than a flat piece of optical glass, after all.
You could be right but I have never encountered a UV filter that reduced image quality. If you have, please provide the brand so people can avoid it.
OK. But I've tested about 20 of them and none affected image quality.