77mm neutral density filter Fader ND Filter ND2-ND400 variable neutral density filter (Electronics)
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 on