Filtro ND8-ND128 Nano-X Variável (4 a 7 stops) diâmetro 52mm

So if you don't go beyond about half way as far as filtering, the filter does ok. Otherwise it introduces a sepia-like color cast to the image. And even though it's designed to work with the ultra-wide iPhone lens, it really doesn't at the higher stops as you do get vignetting.