Gossen Lunasix exposure meter.
The Lunasix is one of the better exposure meters made by Gossen. The
development of the Lunasix has been started many years ago which can be
seen by the development prototype and the design prototype of the Lunasix currently in the 'Stadtmuseum
The Lunasix has been made in different versions. The first marketed
version of the Lunasix has 2 press buttons on the right hand side and
the second model has a rocker switch.
There is also a version for the US
market of this first type with double ASA text on the center scale where the international
version has DIN and ASA on the scale. Gossen modified and renamed a lot
of meters special for the US market. The Lunasix was marketed with the
same name in the US and the rest of the world. The next version was
named Lunasix Electronic and after this version the name changed to
Luna-Pro for the US market.
The second version of the Lunasix has been modified with a rocker switch
instead of the double button and a complete different reading scale
All types of the Lunasix contain a CdS cell for light measurement.
Therefore the meter needs a battery to operate, the type of battery used
is a Mallory PX 13 Mercuric
Oxide 1.35 V. These batteries are not longer available.
The MR9, PX13 and PX625 is a
discontinued Mercuric Oxide coin type cell that was commonly
used in cameras and is now banned because of toxicity and