Leica Super-Angulon 21mm f/3.4這款鏡頭的光圈葉片前、後有各有一組三枚鏡片黏合的膠合鏡組，這兩個鏡組都有可能會出現脫膠離膠的問題。此次這支Leica Super-Angulon 21mm f/3.4出問題的是後膠合鏡組，依照我建立的標準維修程序，在將鏡組取出之後，小心的將三枚原本黏合在一起的鏡片分開，徹底清潔乾淨，再精準的重新黏合，最後在鏡邊壁塗上避光黑漆。從下面的照片可以看到此鏡的脫膠離膠鏡組已經被完美的修復！
這款鏡頭除了膠合鏡組會有脫膠離膠的問題之外，內部鏡片也很容易出現薄霧，不過可以放心的是 這薄霧基本上都是可以藉由小心的清潔完全去除，讓鏡片恢復乾淨通透！
這款鏡頭除了膠合鏡組會有脫膠離膠的問題之外，內部鏡片也很容易出現薄霧，不過可以放心的是 這薄霧基本上都是可以藉由小心的清潔完全去除，讓鏡片恢復乾淨通透！
The Leica Super-Angulon 21mm f/3.4 has two sets of cemented triplet lens groups—one in front of and one behind the aperture blades. Both of the triplets are prone to elements separation. In this case, the issue occurred in the rear cemented triplet. Following my standard repair procedure, after taking out the lens group, I carefully separated the three originally bonded glasses, thoroughly cleaned them, and then precisely re-cemented them back together. Finally, the anti-reflective black paint was applied to the lens edges. As you can see from the photos below, the elements separation has been perfectly restored!
In addition to elements separation, the internal elements of this lens are also very prone to developing haze. But don't worry, this haze can generally be completely removed with careful cleaning, bringing back to clean and clear condition!
In addition to elements separation, the internal elements of this lens are also very prone to developing haze. But don't worry, this haze can generally be completely removed with careful cleaning, bringing back to clean and clear condition!
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