Lightmeter Battery Adapter Kit

"Got it and shot my first roll with the lightmeter.
I have to admit I was skeptical but probably the
best exposure I have gotten with the K-3 yet. Thanks!"

Erik, from http://www.guerrillaart.com

The K-3 has an internal electronic lightmeter which is handy for quickly setting the proper exposure. Like many lightmeters, it was designed to use a mercury cell that is no longer available (the PX640).

To address this problem, we've created a Battery adapter that allows the use of a zinc-air cell in the K-3. Zinc-air cells are also known as "hearing aid batteries", are available everywhere, and are inexpensive.

The adapter is sold in a kit that includes the precision machined brass adapter and four zinc-air cells. Instruction Sheet Only $29! (+$4 shipping in the US, $5 to Canada, $8 Elsewhere)

(The PX640 battery was also used in the lightmeter circuits of many 35mm still cameras including the Miranda Sensoret, the Soligar Sensoret, and some Minolta and Yashica cameras from the early 1970s. It is also used in the Pentax Spotmeter. Sometimes called EPX640, V640PX, or PC640A. So if you have one of those cameras, this adapter will work as a replacement for the 640 as well!)

We also offer a PX640 Battery Dual Kit for $49 (+$5 shipping in the US, $6 to Canada, $9 Elsewhere). Same as above, but includes two of the machined brass adapters (useful for 35mm cameras that used two of the 640 mercury cells for the lightmeter circuit). Use the Dual adapter links.

 

 

Dual Battery Kit Links