Any thoughts on the urth uv+ ?
Just one .
Never heard of 'em ! Who are they ?
Buy from a respected brand and get good results .
If their cheap and naff , they will degrade the image . No point buying good quality lenses and film only to put the bottom of a jam jar in front of it !
I only use filters if their use is warranted .
Typically ND's , colour correction and contrast control for b&w .
The only two reasons I use a UV is if I'm up in the mountains and want to cut through the UV haze , or if in in an area where the lens could get damaged , such as on a windy beach , or where there's motor sport with mud flying about .
A filter is better getting sandblasted or scratched than the lens .
As noted , get a good brand , B&W , the higher grade of Hoya ( not the cheap grade ) and OEM and so on .