練習Nikon 老鏡處理-對焦環卡死及鏡片發霉 focusing ring blocks , CLA, and remove fungus

練習Nikon 老鏡處理-對焦環卡死及鏡片發霉

廢鐵等級老鏡，練練處理技術

Nikon 以前叫日本光學（NIPPON KOGAKU）

NIKKOR-Q Auto f4 f=20cm /200mm  1961-1962

這隻1961-1962年出廠，出廠已經超過55年

對焦環潤滑由可能是鋁片氧化或變質乾涸

已經嚴重卡死啦，希望能用溶解對焦環的老舊潤滑油

噴了WD40靜置一段時間，還是打不開，

改灌了幾次丙酮的有機溶劑，到半夜了，仍無結果

等這個假日，再試試看！

This lens was manufactured in 1961-1962, which means it has been more than 55 years since its production. The focusing ring is currently stuck, possibly due to oxidation or drying of the lubricant, which might be aluminum-based. I tried using an old lubricating oil to dissolve the old lubricant. I sprayed WD40 and let it sit for a while, but it still wouldn't budge. I then tried pouring organic solvent, acetone, multiple times until midnight, but still with no results. I'll try again during this holiday and see if I can make any progress!

這隻是

NIKKOR-S Auto 1:2.8 f=3.5cm 1959-1962

鏡片嚴重發霉，太厚的霉菌已經弄壞鍍膜，用酒精擦不掉，我看可能要拆下來用水洗，或是高路潔的藍色牙膏（不含二氧化鈦的成分）輕輕研磨一下，是否能有效除霉菌！
對焦環齒輪，先滴入丙酮靜置一段時間，用力轉一下，就可以溶開卡死對焦環上的潤滑油。
潤滑油已經變成銀色膏狀，應該是氧化鋁與潤滑油的混合物，能轉動，後面就好處理！

The lens has severe mold growth, and the thick fungus has already damaged the coating. It cannot be wiped off with alcohol. I think I may have to dismantle it and wash it with water or gently polish it with a non-titanium dioxide-containing blue toothpaste like Colgate. I wonder if this can effectively remove the mold.

As for the focusing ring gear, I first applied acetone and let it sit for a while to unlock the srews . After that, I exerted some force to rotate it, which dissolved the stuck lubricant on the focusing ring.

The lubricant has turned into a silver paste-like substance, likely a mixture of aluminum oxide and lubricating oil. It can now be rotated smoothly, so the rest should be easier to handle!