Canon Booster Meter For Canon QL FT FTb Bodies With Case Untested As Is

Canon Ftb Light Meter Mercury. James's Light Meter Collection Canon Booster meter The "bolt" position is for use with certain flashes. I don't know exactly how important 0.05V is for the correct functioning of its light meter but for comparison the manual of the canon f-1 states: "a 1.35 V HD Mercury battery should be used" and "do not use 1.4V mercury batteries" so they are quite firm about not using a battery 0.05V above the one specified.

However, due to modern regulations and environmental concerns, mercury battery sales are now banned in many countries Hi, I have a Canon FTb and I put an LR44 battery in it which is 1.5 volts

Genuine Canon Camera Booster Light Meter W/ Case for Canon FTB Untested

The equivalent replacement battery is the PX625A, which is a safer alkaline cell. However, due to modern regulations and environmental concerns, mercury battery sales are now banned in many countries The replacement battery is a 1.5v alkaline battery 625a.

CanonFTb w/55mm f/1.2 SuperSpeed lens. The FTb body was … Flickr. These old meters were designed with a 1.3V mercury battery in mind; modern alkalines output 1.5V The Canon FT QL and FTb models have their battery compartments on the side so if they stick out a little it doesn't cause a problem

Canon FTb Battery Replacement 35mm SLR 1.3V Mercury Battery Replacement.

Much has been written about workarounds to deal with the demise of the old mercury batteries for light meters of the Canon FT-QL, FTb, etc.
Recently, I came across a battery replacement that was designed to work in Bulova Accutron watches that can't use zinc oxide batteries but need the voltage characteristics of the original mercury. However, due to modern regulations and environmental concerns, mercury battery sales are now banned in many countries