Leupold Mark 4 tactical spotting scopes are high-end scopes with excellent optics and an added reticle for military use. Mark 4 scopes come in several configurations, either with 12-40x zoom and 60-mm objective lenses or 20-60x zoom and 80-mm objectives. All Mark 4 Tactical scopes are waterproof; some feature durable, armored magnesium frames.