Contax Carl Zeiss Distagon 28mm f/2.0 T* 鏡片清潔對焦環重新潤滑改無段光圈 Clean lens elements, Lubricate focusing helicoids, De-click the aperture ring

這支Contax Carl Zeiss Distagon 28mm f/2.0 T*送來做基本保養，包括

• 鏡片清潔，去除雜塵、薄霧與油漬油霧
• 對焦環重新潤滑。因為這支鏡頭有浮動鏡組的設計，所以在最後組裝時，必須要適當的校正，確保邊角的成像品質
• 鏡頭主人要用它來拍攝影片，所以要把光圈環檔位鋼珠取出，讓光圈轉動變成無段的行程。這個部分必須要使用比較厚重的潤滑油脂，以避免在無段行程下，光圈環太容易因不小心碰觸而轉動

This Contax Carl Zeiss Distagon 28mm f/2.0 T* sent me for basic maintenance, the details are~

• Cleaning lens elements to remove dirts, fog and oily vapor.
• Lubricating focusing helicoids. This incorporated the floating elements design, it is necessary to adjust and calibrate the extra focusing helicoids to proper position to ensure the corner image quality.
• De-clicking the aperture ring for future cin-mod. The owner of this lens prefer a stepless and quite aperture control for videography, so needs to remove the small stainless ball and apply thicker and heavier grease.