Okko Pro / ND64（6級）中性密度濾鏡 77mm

The color cast is practically invisible on this 6-stop filter, which is exactly what I needed for longer exposures. The threads are smooth and the glass doesn't seem to pick up fingerprints as easily as my older ones.

Took this ND64 filter out for some long exposure shots of a waterfall, and the 6-stop reduction was spot-on for getting that silky smooth motion without any weird color cast. The glass feels solid in hand, and the threads mounted smoothly onto my 77mm lens.

Took this out on a bright sunny day at f/2.8 and the 6-stop reduction held exposure exactly as expected, no weird blues creeping into the highlights. The glass is slim enough that I didn't spot any vignetting on my wide lens, though the threads felt a bit stiff when screwing it on.