Carl Zeiss Jena Biotar 7.5cm (75mm) f/1.5 前後鏡片拋光 對焦環光圈環清潔潤滑 Polishing for front and rear lens glass

這支送來整理的 Biotar 7.5cm f/1.5 的前後鏡片都有明顯的鍍膜與鏡片的損傷，需要拋光處理才能夠恢復可以拍攝清晰照片的狀態。 另外，對焦環與光圈環轉動手感太緊，需要重新潤滑。
下面實際處理的照片可以清楚看到，前、後鏡片的狀況很差，整片霧矇矇的。 在拋光處理之後，鏡片恢復乾淨透亮，光學表現如原本一般犀利，不受拋光影響！！

This Biotar 7.5cm f/1.5 has serious coating and glass damages, and need a polishing treatment to make it clean and clear again. Beside that, the focusing and aperture ring work very tight, and need a re-lubrication.
As you can see from the posted images below, the original condition of the front and rear glasses are very bad, full of scratching damages. After polishing treatment, without altering its optical performance, the glasses regain clean and clear condition!!