I ordered the Tiffen 58mm UV filter to use on a Nikon 50mm f1.4G. It didn't look all that bad, but I immediately noticed increased flare and degraded sharpness in my pictures. It required a filter wrench to remove it from the lens because the mount is very soft and threads not quite machined right. After I removed the filter, the glass was rattling loose in the ring. It is now in the trash bin. I purchased the B+W 58mm UVA (Ultra Violet) Haze MRC Filter #010 to replace it.