I own the Singh-Ray Vari-N-Duo filter and find it quite a useful creative tool. I thought I was using it properly, but then ran across a YouTube video of photographer Jason Odell explaining how he uses it. I found the video very helpful.
While I had been using the filter reasonably correctly, I did find a few great tips in the video that I will put into use, such as picking a specific white balance setting and not using auto-balance (which is good practice anyway, but more important here) and picking your aperture and shutter speed manually and then rotating the filter to achieve the exposure, instead of vice-versa.
Anyway, I found some nice tips here and thought I would share it. If you own and use the filter, have a peak at this instructional video…it is well worth the 5 minutes. Check it out at the link below:equipment, technique