I fully admit, I got this just to play with. It is a 58 mm screw on variable ND filter that says it goes from 2 stop to 400 stop (?!? yeah, right). It does not go that high, would that not be pretty much solid? I mean you can barely see through a 10 stop so it seems to peak at around that point.
This is what is looks like. You turn part of it just like a circular polarizer to adjust how many stops. Unfortunately, this is guess work, it is not labelled to give you any guideline other than it is safe to assume that "min" is 2 stops.
I did a test yesterday to see how well it works. I shot the photos in RAW. Here is my no ND shot:
It was getting cloudy, dark and windy when I was doing this.
Here is the ND filter on and set at about 3/4 to max:
The first thing I noticed: no colour cast. I was quite amazed actually. I fully expected some sort of colour cast.
I did process the photos in Lightroom 4 and sync'd the settings so they are processed with exactly the same settings. I can do photos that are just converted from RAW with nothing else if anyone wants to see.
Here is one of the best parts, the cost. It was $21 CDN from
Amazon. The link goes to Amazon Canada. The filter is made by a company called
Neewer.