Sekonic L-758D DigitalMaster Light Meter Receptor Head: Rotating Domed Head 90 degress to the right, 180 degrees to the left, Removeable for Contrast Reading Light Receiving Method: Incident light and reflected light Receptor Incident Light: Convertible to flat diffuser (Lumisphere in down position) Light Receptor Element: 2 Silicon photo diodes (incident and reflected) Reflected Metering Distance: 1.0m to infinity