The blades can be cleaned with high grade gasoline. To avoid similar failures, you must pay attention to:
1. The aperture blades should be allowed to soak for a few minutes in the gasoline. After the grease is fully dissolved, the two sides of the blade are cleaned with a small row of pens.
2. After brushing the aperture blades, use lens paper to clean the remaining gasoline on both sides and blow dry with a blower.
3, try to avoid touching the blade with your fingers, so as not to rust after the leaves are stained with sweat.
4. Wipe the inner wall of the inner tube and the moving piece ring, the six-hole ring, the copper washer, and the aperture seat with lens paper or cotton wool moistened with gasoline, and then blow dry with a balloon. Be careful not to erase the positioning marks.
Assembly of the aperture assembly. It is reasonable to operate as follows: Install the rotor ring. After turning the focus ring to >, the aperture lever on the rotor ring is passed through the hole with the smallest aperture stop on the inner tube, and the inner lens tube is placed vertically on the table through several layers of lens paper. (The rear lens is down); the aperture blades are placed. According to the blade orientation shown in Fig. 5, the aperture blades are placed one by one on the aperture ring. Note when placing: First, make the moving ring ring pin on the blade enter the waist hole on the moving piece ring; second, make the inner arc of the blade and the edge of the inner ring of the moving piece ring basically coincide (ie, the aperture is fully open) Position); three is placed clockwise, the second piece is stacked on top of the first piece, that is, the rear placed blades are stacked on top of the front piece; the fourth is placed on the sixth piece, with the tip of the blade slightly picked After starting the first blade, carefully place the sixth blade in place.
Visual inspection then: the rotor ring pin on the blade must be fully in place; the six-hole pin on the blade should be substantially on one circumference; the pitch of the six pins.
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