Screenshots:
Spoiler:Top shows a normal view in E1M1. Once SmartZoom detects a target, it zooms as shown at bottom. These options are controlled in the Settings menu, including the minimum distance to trigger a zoom (that also determines the zoom factor), magnification factor (multiplied by the calculated zoom factor), and how often it should scan. The zoom remains in effect until the player or target moves.
Now at v1.0