Metering Method Incident light and reflected light (with optional attachment)
Receptor Head Lumisphere convertible to flat diffuser (with retracted Lumisphere)
Receptor Element Silicon photo diodes
Measuring Modes Ambient: Aperture priority measuring, Shutter speed priority measuring, TF priority measuring, Cine measuring, HD Cine camera measuring, Illuminance measuring (lux, foot candle), Luminance measuring (foot-lambert, cdm2) Flash: Cord Mode (with/without multiple cumulative), Cordless Mode (with/without multiple cumulative), Radio triggering Mode (with/without multiple cumulative)
Measuring Range Ambient- Incident: EV -2 to 22.9 (approx. f/2 at 15 sec. to f/22.9 at 1/8000 sec.) / Reflected: EV 3 to 19.9 Flash light- Incident: f/1.0 to f/128.9 / Reflected: f/2.8 to f/128.9 Illuminance- 0.63 to 2,000,000 lux / 0.10 to 180,000 fc (EV -2 to 19.6) Luminance (Reflected Light)- 1 to 980,000 cdm2 (EV 3 to 22.9) / 0.29 to 290,000 fl (EV 1.5 to 22.9)
Repeat Accuracy +/- 0.1 EV or less
Calibration Constant Incident: Lumisphere C = 340, Flat C = 250 Reflected: K = 12.5
Power Source 2x AAA dry cell batteries (alkaline, manganese, lithium, nickel hydride, or nickel-based)
Operating Temperature: 14-122°F / -10-50°C (no condensation)
Storage Temperature: -4-140°F / -20-60°C (no condensation) |