I was able to try out some pretty powerful ND Filters. A ND (Neutral Density Filter) reduces the intensity of all wavelengths or colors equally. I stacked two filters together which equals to a drop of 13 f/stops. There was a learning curve. First, you must use an eyepiece shield to block your viewfinder. Light will filter in on long exposures and create a band of color across your image. I also learned that you cannot stack more than three filters. If you do, you will pick-up the filter ring in the image. Also, on long exposures, hot pixels will show on the image (it will look like dust). There…