Made to greatly simplify the process of focusing with anamorphic adapters, this SLR Magic Rangefinder Cine Adapter provides a calibrated focus scale, marked in feet, industry standard focus direction, and a cine-style focus gear for your lens set up. When using most anamorphic adapters that mount to the front of your lens, focusing requires matching the distance on the anamorphic adapter and the lens itself; this can cause problems when trying to pull focus. However, when using the Cine Rangefinder, you set both your anamorphic adapter and lens to infinity and pull focus on the rangefinder.