H-17H Tips on Speedlight Care and Reference InformationSpecificationsEffective flash output distance range (for i-TTL flash control)The effective flash output distance range of the SB-500 is between0.6 m and 20 m (2 ft and 65.6 ft). The effective flash output distancerange differs depending on the ISO sensitivity and aperture.ISO sensitivity50 100 200 400 800 1600 3200 6400 12800Aperture (f)1.4 1.1 –121.5 –16.92.2 –203 –204.3 –206 –208.5 –2012 –2017 –20Effective flash output distance range (m)2 0.8 –8.41.1 –121.5 –16.92.2 –203 –204.3 –206 –208.5 –2012 –202.8 0.6 –60.8 –8.41.1 –121.5 –16.92.2 –203 –204.3 –206 –208.5 –204 0.6 –4.20.6 –60.8 –8.41.1 –121.5 –16.92.2 –203 –204.3 –206 –205.6 0.6 –30.6 –4.20.6 –60.8 –8.41.1 –121.5 –16.92.2 –203 –204.3 –208 0.6 –2.10.6 –30.6 –4.20.6 –60.8 –8.41.1 –121.5 –16.92.2 –203 –2011 0.6 –1.50.6 –2.10.6 –30.6 –4.20.6 –60.8 –8.41.1 –121.5 –16.92.2 –2016 0.6 –10.6 –1.50.6 –2.10.6 –30.6 –4.20.6 –5.90.8 –8.41.1 –121.5 –16.922 0.6 –0.70.6 –10.6 –1.50.6 –2.10.6 –30.6 –4.20.6 –5.90.8 –8.41.1 –1232 — 0.6 –0.70.6 –10.6 –1.50.6 –2.10.6 –30.6 –4.20.6 –5.90.8 –8.445 — — 0.6 –0.70.6 –10.6 –1.50.6 –2.10.6 –30.6 –4.20.6 –5.964 — — — 0.6 –0.70.6 –10.6 –1.50.6 –2.10.6 –30.6 –4.2