Variable ND Filter Comparison
The DSLR Film Noob returns with a valuable side-by-side of two variable ND filters in different price ranges. A basic ND filter will restrict the amount of light entering your camera, relieving your aperture to do other things (like adjust depth of field). These come in different levels of light restriction, which means you have to unscrew and screw them on to adjust the amount of light you want coming in.
A variable ND filter lets you make these changes on the fly. One variable filter handles the same job as three normal ones. You pay for this convenience, but it it is handy. Deejay gives us the skinny on how well the cheap version holds up to the more expensive one.