shawn
Veteran
The MR-9 battery adapter fits the Leicaflex SL2 but doesn't really fit my Leicaflex SL. Decided to just open it up and install a BAT83 schotty diode to drop the meter voltage down to compensate for not using a mercury battery in it. Very easy to do and plenty of room to work around the battery holder.
Need a Robertson #3 square drive bit and a small flat edge screwdriver along with a soldering iron, needle nose pliers and the diode.
The base of the SL comes off with the two visible screws and another nut that is accessed through the tripod mount. The two screws are inserts with flat edge screws inside of them.
The nut inside of the tripod mount is the robertson square drive. It is normal threaded but since you are working it from the opposite side (it loosens into the body) you loosen it by turning CLOCKWISE. After those three the bottom plate is free.

The blue wire leads to the negative terminal on the bottom of the battery holder. You desolder this wire and solder the diode between the tab and the wire with the band toward the tab.

Make sure the diode isn't shorting out against anything and then put the bottom plate back on and it is done. 15 minute job or less. The diode was $0.39.
SL2 looks like it would be just as easy to do too.
Shawn
Need a Robertson #3 square drive bit and a small flat edge screwdriver along with a soldering iron, needle nose pliers and the diode.
The base of the SL comes off with the two visible screws and another nut that is accessed through the tripod mount. The two screws are inserts with flat edge screws inside of them.

The nut inside of the tripod mount is the robertson square drive. It is normal threaded but since you are working it from the opposite side (it loosens into the body) you loosen it by turning CLOCKWISE. After those three the bottom plate is free.

The blue wire leads to the negative terminal on the bottom of the battery holder. You desolder this wire and solder the diode between the tab and the wire with the band toward the tab.

Make sure the diode isn't shorting out against anything and then put the bottom plate back on and it is done. 15 minute job or less. The diode was $0.39.
SL2 looks like it would be just as easy to do too.
Shawn