When I overhaul a film magazine, I usually replaced the light trap and nylon stop. What are these things and why do they have to be replaced?
The light trap is a piece of foam that prevents light from entering the magazine when the dark slide is removed. The foam wears, and eventually will wear to the point that it will allow light to enter the magazine and fog the film when you remove the dark slide. This is why it is replaced during an overhaul. It’s better to be safe than sorry, and replacing a light trap during an overhaul is cheap insurance. The nylon stop is a little more complicated. Look at the rear plate of your camera body, and you will notice an opening about 1/16″x 3/4″ in the upper right hand corner. When you wind the body, teeth from a gear start to emerge from this opening. Now look at the rear plate on one of your magazines. You will notice an opening of the same size in the upper left hand corner of the rear plate. In this opening is a gear. If you look at the lower part of the gear, it looks like a tooth is missing. This space is where the first tooth on the body gear goes into. As you wind the body, the bo
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