property Shutter.shutterLevel Shutter speed as a fraction of a second; always written in replies. Type "1/3" | "1/4" | "1/5" | "1/6" | "1/8" | "1/12" | "1/15" | "1/25" | "1/30" | "1/50" | "1/60" | "1/100" | "1/120" | "1/250" | "1/500" | "1/1000" | "1/2000" | "1/4000" | "1/10000"