Angenieux Type Y12 90mm f/2.5 前鏡片點狀/霧狀變質拋光 Polishing the front element surface deterioration

這支Angenieux Type Y12 90mm f/2.5的前鏡片外側面有明顯的點狀/霧狀的變質，逆光拍攝會有明顯白霧，反差也會降低。 鏡主希望拋光讓它恢復乾淨通透。 
照片可以看到拋光前、後的差異。拋光後 鏡片恢復清透，成像恢復清晰銳利。

This Angenieux Type Y12 90mm f/2.5 had strong traces of hazy/tiny-dot deterioration of the outer surface of the front element, that made the images look foggy and low contrast when shooting under backlight situation. The owner wanted me polish this deteriorated surface.
As you can see from the attached images, there is a huge differences in the clarity between before and after polish. The lens performs great and produces clear and rich contrast images under backlight situation now.