Leica Leitz Summaron 35mm f/2.8 Goggle 眼鏡小八枚
對焦環/對焦螺紋潤滑
鏡片薄霧發霉髒污清潔
對焦眼鏡鏡片發霉薄霧清潔，眼鏡的水平/垂直疊影偏差調整校正
Lubricating the focusing ring/helicoids
Lens elements cleaning: fungus and fog
Goggle lens elements cleaning: fungus and fog
Adjusting and calibrating the yellowish RF-patch bias in both vertical and horizontal accuracy
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