Light Craft Workshop 77mm ND500MC Filter

I recently bought this and I'm still getting to grips with it. I'm using it on a Canon 24-105f4L and EOS600D. With the variable ND you may find yourself just using it at maximum for the longest exposure times, but the flexibility is a benefit. Check...

Works well. Easily screwed on. No problems with the cast that you can acquire just a simple tweek on white balance