Leica Leitz Summicron 5cm 50mm f/2.0 Collapsible 縮頭五 修復脫膠離膠 Fixing the elements separation

這支 縮頭五 Leica Summicron 5cm f/2.0 Collapsible 的後內膠合鏡組有脫膠離膠的問題，依照下列照片所示的標準處理步驟，便可將問題解決。 早期鏡頭 內鏡片的鍍膜非常脆弱，透過特殊清潔方式，可以完全不傷鍍膜的將鏡片清潔乾淨！

如果您的鏡頭有類似的問題想要處理，歡迎直接跟我聯繫！

This Leica Summicron 5cm f/2.0 Collapsible had a problem in elements separation that happened on its rear internal doublet. Following the standard re-cementing procedure, as shown in the attached images, the problem can be perfectly solved. 

The coating on the internal elements surfaces are all quite delicate and very easy to got coating scratches or cleaning marks. This undesirable result can be completely avoid by using a specific cleaning technique.

If your lens has similar issue and want to solve, please let me know!