Professional filter used only with professional high end cameras. No scratches, blemishes or excessive wear of threads to screw on and off lens. Attachment grooves clean and smooth. And this is the thinner professional designed filter casing that adds minimal focal length to an already long lens, especially if using a zoom, and it eliminates the risk of any shadowing effect.
Only selling because I had to sell many of my professional lenses due to healthcare needs and expenses. Once I overcome surgical debt I hope to acquire some of this amazing equipment again.
Meanwhile I hope that these high end optics can be used for some incredible photography instead of sitting in my studio while I heal.
Enjoy and be blessed!