Monthly Archives: May 2010

Calibrating Gossen Lunasix 3 (LunaPro)

Gossen Lunasix 3, although built around the early ’70, is a very capable hand-held meter even by today standards. It beats my Canon 20D built-in meter in terms of actual low-light performance by 5 stops. Unfortunately it belongs to one of these designs, that relied on mercury battery voltage staying constant throughout their life and mercury batteries were banned few years ago. This article describes, how to deal with this problem. Continue reading

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