Digital HT™ Color-Grad™ Neutral Density Filters
Often, you want to balance light intensity between two areas within a scene. This is important outdoors to allow more sky detail while properly exposing the foreground. Exposing for the foreground will produce a washed-out, over-exposed sky, exposing for the sky will leave the foreground dark, underexposed.
* Independent testing based on these specifications was conducted at the Rochester Institute of Technology (RIT), Rochester, NY.
1. Abrasion test: Severe abrasion test according to MIL-C-48497, using eraser stub certified to MIL-E-12387.
2. Adhesion test :™ tape adhesion test according to MIL-C-48497, using adhesive tape certified to MIL-A-A113 rev C.
3. Humidity Test: humidity test in accordance with MIL-C-48497, 95% RH at 50
degrees C for 24 hours.