Once upon a time I had a tiffen filter on the end of one of my first lenses, and have since removed it now that I know a lot more about photography and saw how awful it looked even on the LCD screen.
Now, I find myself often photographing children and dogs and am thinking a UV filter might again be a good idea, especially now that I know not all UV filters are made equal.
I don't have any L glass yet, so I don't see a reason to spend upwards of $50 on any filter for a long time. In fact, my best lens is the EF 85 f/1.8 (and soon to be accompanied by the EF 28 f/1.8 ) and will be my best lens until I can save up for a full-frame and better justify sticking some fancy glass onto my camera.
So anyway, is this filter high-quality enough that I can spend less than $50 and not notice a difference in IQ?http://www.adorama.com/BW58UVMDP.html
I've heard good things about B&W thusfar. I know that the cost of replacing the front element of these lenses is likely the same price as the filter (or less) but at this stage in my business I can't afford the time to have the lens fixed. These kids are ruthless.