Gossen Pilot Service

My favorite selenium meter is the coupled meter for a Canon VI (or Canon P) rangefinder.

It couples to the shutter speed knob, so you only have to read the aperture value and set it on the lens.

The original one died many years ago.

Not so many years ago, I got one from eBay, which works some of the time.

Tapping on the side sometimes restorers it.

Usually it either works or not at all.

The problem on selenium cells is the contacts, which are usually mechanical.

Especially the front, which is a thin layer of gold with a contact point near the edge.

The back contact is, I believe, onto the iron substrate, which also can get bad.