Dallmeyer Super-Six Anastigmat 3" 75mm f/1.9 修復脫膠離膠 Fixing the elements separation

這支 Dallmeyer Super-Six 3" 75mm f/1.9的第二鏡組有脫膠離膠的問題，也就是用來黏合兩枚鏡片的膠變質的。 處理方式就是把兩枚鏡片分開、清潔後，準確地重新黏合，過程如照片所示，最後順利且完美地將問題解決，鏡片恢復乾淨通透

This Dallmeyer Super-Six 3inch 75mm f/1.9 got a problem of doublet elements separation on its 2nd lens group. The way to fix the problem is to taking apart the two elements which originally cemented together, then cleaning and the final step is re-cementing accurately. The whole process and the result are as shown in the attached images, and the problem is solved perfectly.