Sigma 17-35mm f/2.8-4.0 D Aspherical 嚴重發霉清理 Cleaning the serious fungus

這支送來處理的鏡頭有嚴重的發霉問題。
每片鏡片都長了霉，雖然霉長滿了大部份的鏡片，但所幸長得不深，都清理乾淨之後，在鏡片上並沒有留下太多的霉疤(霉蝕痕)。 清理之後，鏡片看起來就恢復乾淨透亮！

This Sigma 17-35/2.8-4.0 aspherical got a serious fungus and spread to all piece of glasses. Fortunately, most of the fungus growing on the superficial surface of the glass, not too deep. The cleaning treatment makes the glasses clean and clear again.