Hoya Solas Variable Neutral Density Filter with De-Polarization Layer and Aluminum Body (77mm)The downside to most variable neutral density (fader) filters is unpredictable color shift, loss of sharpness, and glare. These deficiencies are caused by low quality glass, bad multi coating technology, cheap polarizing films, and poor manufacturing. The result is an inexpensive but image degrading product. Results are straight from the camera. Each filter was tested multiple times to ensure focus was accurate and results were fair. Sharpness loss is