LEICA SUMMILUX-M 24mm f/1.4 ASPH. 浮動鏡組鏡片油點清潔 Cleaning the oil spots on floating elements

 這支LEICA SUMMILUX-M 24mm f/1.4 ASPH.的浮動鏡組的其中一枚鏡片的邊緣有幾滴明顯的油點需要清潔

它的浮動鏡組位於鏡片結構的後半部，需要從前端開始 把大部分的結構都拆解，才有辦法取出浮動鏡組

浮動鏡組是由兩枚鏡片構成，一枚是鑲嵌在金屬框上，一枚是用橡皮圈固定在這金屬框裡。有沾上油點的就是這枚可以單獨拆卸的鏡片

在拆鏡的過程中發現，內鏡筒有很多滲漏的潤滑油脂，這可能是造成鏡片上出現油點的原因，這些都會在拆裝過程中清除，而拆解過程中難免會觸碰到其他鏡片，這也必須在組裝過程中一併清潔乾淨

為了要清潔一枚鏡片上的油點，必須要整支鏡頭幾乎肢解，這確實是一件耗時費工的工作～ 

This LEICA SUMMILUX-M 24mm f/1.4 ASPH. came in with some noticeable oil spot son the edge of its floating element group, which sits in the rear section of the lens. To get to it, I had to strip down almost the entire structure from the front.

The floating element group holds two lenses—one embedded in the metal frame and one held in place by a rubber O- ring. The latter was the one contaminated with oil spots. During the process, I found a lot of leaked lubricant inside the inner barrel, which was likely the cause of the oil spot on the glass. All of this migrated grease will be thoroughly cleaned out during the overhaul.

Aside from degreasing the barrel, any other elements touched during the teardown will be carefully cleaned during reassembly. It’s an incredibly tedious and time-consuming job just for one tiny oil spot, but that’s what it takes to do it right!