Description
The Gossen Lunasix is a hand held exposure meter and famed for its low light sensitivity, still impressive by today’s standards. It was Gossen’s first light meter not based on a selenium light receptor. The styling, layout, and distinctive “computer” dial set the standard for successive Gossen meters until the advent of electronic displays.
The meter movement and operating mechanism are mechanical, however the CdS light cell requires battery power. Measurement is made by depressing the rocker switch in one direction for low light, and the other for daylight. When the rocker is released the needle remains clamped in place making transfer of the reading to the “computer” ring much easier.
Maker: Gossen
Dates: 1961-1980
Variants: Lunasix, Lunasix 3, Lunasix 3s
Type: Ambient exposure meter
Display: Pointer needle with mechanical computer
Sensor: CdS
Measurement angle: 30° reflected, 180° incident
Multiple measurements: no
Ambient sensitivity: -8 to +24LV (Lunasix 3 -4 to +24LV)
Flash sensitivity: N/A
ASA/ISO range: ISO 8 to 2,500
Incident light: Yes
Reflected light: Yes
Flash measurement: No
Aperture range: f 1 to 90
Time range: 1/4,000s to 8 hours
Battery: 2×mercury (later 2×silver oxide)
Weight: 170g
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