Mamiya G 75mm f/3.5 L 脫膠/離膠 重新黏合處理 Cementing lens group separation, Re-cementing treatment

這支Mamiya 6x6 中片幅RF機身用的鏡頭，它的前膠合鏡組出現脫膠/離膠的問題
從下面照片中可以清楚看到這組鏡片有明顯類似摩爾/彩虹紋路。這種紋路也是一種典型的脫膠/離膠的表現，這紋路是出現在兩片黏合鏡片的黏合面中，通常這也會伴隨輕微的薄霧。這組鏡片膠合面也有輕微薄霧，不過很淡，拍不出來，所以就沒有po出來
脫膠/離膠的處理並不困難，但就是過程繁複，每個步驟都要很小心，才能處理得很漂亮
這支鏡頭的問題最後當然是順利的解決了～

This Mamiya 6x6 medium format RF lens got a significant sing of separation to its front cemented lens group, as you can see in the provided photos below. The Moire-like/Rainbow-like pattern is a kind of typical sign of separation that shows between the cementing layer, and sometimes accompanied with slight haze. This case also has slight haze shows on the gap between the two cementing lens, but too light to be captured by camera, so no provide here.
The treatment of separation is not difficult, but the whole process is quite complex, and need pay extra attention to each step to ensure a perfect result.