2014年12月29日 星期一

FOCA OPLAREX 5cm f/1.9 鍍膜與玻璃變質霧化拋光處理 Coating & glass deterioration, polishing treatment

這支 FOCA OPLAREX 5cm f/1.9 前鏡片的鍍膜嚴重老化變質,連玻璃本身都有受損,整隻鏡頭看起來就是霧濛濛的。
鏡片拋光是唯一解救這種變質症頭的方法。這麼嚴重的霧化變質只能將大部分的損傷拋除,讓鏡片看起來乾淨通透即可。是沒有辦法連一些較深層的損傷都拋除,因為拋除這些較深的傷,會連帶改變鏡片曲度,進而使鏡頭無法正確成像。
拋光前、後都拍了試拍照,最後兩張照片可以清楚看到拋光處理在成像上所帶來的顯著影響。
恭喜這隻鏡頭重生了!

This lens (FOCA OPLAREX 5cm f/1.9) got a serious coating and glass deterioration to its front glass. It looks really hazy and foggy.
Polishing is the only way to save this lens. Polishing treatment can remove all the aged coating and the damages/marks happened to shallow surface of the glass. Minor deep marks is unable to polish, because the core value of polishing treatment is to maintain the original curve of the glass to keep the precise image.
The last 2 photos (pre- and post-polishing) show the significant benefit from the polishing treatment.
Many happy that the lens got a rebirth!












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