CONTAX Carl Zeiss Distagon 21mm f/2.8 T* 第八鏡組脫膠離膠重新黏合 Re-cementing for the 8th lens group elements separation

CONTAX Carl Zeiss Distagon 21mm f/2.8 T* 這款鏡頭鏡片的通病是 脫膠/離膠。大部分的脫膠/離膠是發生在第6鏡組，少部分是出現在第8鏡組，但也越來越常見。有些case則是兩個鏡組都同時有脫膠離膠的問題
第6鏡組的脫膠離膠的狀態是霧霧的，而第八鏡組的脫膠離膠狀態則是類似雪花狀的。
這支鏡頭的脫膠離膠問題，是出現在第8鏡組。 依照標準的脫膠離膠 重新黏合程序，便可將問題解決。 處理過後，鏡片便可恢復乾淨通透！

The common optical issue of CONTAX Carl Zeiss Distagon 21mm f/2.8 T* is elements separation. The majority happened on the 6th lens group, the minority on the 8th lens group but getting more and more recently. Some cases came with elements separation on both lens groups.
The elements separation of the 6th lens group looks hazy, and the 8th lens group looks like snowflakes.
This lens had elements separation on the 8the lens group. Following the standard re-cementing procedure, the problem has been restored precisely, and it looks clean and clear now!

請參考 第6鏡組脫膠離膠 修復的文章～
Here is the article regarding the restoration of the elements separation happened on the 6th lens group～
https://www.facebook.com/media/set/?set=a.870846619625414&type=3 
http://lens-cla.blogspot.com/2015/03/contax-carl-zeiss-distagon-21mm-f28-t.html