Video Video / Projection Calculations 0 m 0 m 16:9 16:10 17:9 4:3 1.90:1 2.35:1 0 m 0 m 0 m² Front Projection Rear Projection 0.5 — diffuse rear projection 0.7 — standard rear projection 0.8 — gray screen / contrast 1.0 — standard white screen (front) 1.2 — enhanced front screen 1.5 — high gain screen 1.8 — highly directional screen 2.0 — specific use 1.0 — ideal conditions 0.8 — clean installation 0.6 — real event conditions 0.4 — difficult conditions 0 lux 0 nits 0 fL 0 m 0 m 0 % 0 px 0 × 0 0 px