04-01-2016, 11:50 PM
You can get the same effect by mounting a high quality linear pol. filer on a linear (or circular) pol. filter. As far as I know, all variable ND filters are stacked pol. filters, and will give interference patterns when you go too far, but I am pretty sure you are aware of that.
The Singh-rays are unnecessarily think, which may couse corner vignetting.
Bokeh issues:
http://jonasraskphotography.com/2014/05/...-variable/
I have read that the Hoya variable ND filter is better than the B&W.
The Singh-rays are unnecessarily think, which may couse corner vignetting.
Bokeh issues:
http://jonasraskphotography.com/2014/05/...-variable/
I have read that the Hoya variable ND filter is better than the B&W.