So I use this filter to Walimex 35mm F1.4 with ne 5D MK III, at ISO 100 you see nothing, so no mistakes, no lines or bright or dark corners. I was amazed at the filter! I expected worse! I thought I befor me an expensive filter buy I test times to only what the cheap route is made off, and I say mus of enough for me! For testing purposes, I dan ISO pulled up to more than 3000 as I could notice the overlap of the slats. But since I only movies so I'll never work in such a high ISO value with the filter, so the hands me too!
So who just want movies with the filter, it is sufficient all times !;)
