Canon FD 300mm f/2.8 L 救一支鏡頭！重新拋光受損傷的鏡片 Saving a lens by re-polishing a damaged lens element

客人將這支 Canon FD 300mm f/2.8 L送來的時候，它有一個內鏡片因不明原因被胡亂打磨過，造成鏡片表面非常粗糙 凹凸不平整，也讓這支鏡頭沒辦法拍出清楚的照片，不管是最大光圈或是縮到f/8.0成像都是糊糊的

我依照傳統的拋光處理，製作拋光模具之後，小心的拋光，將大部份粗糙的表面拋除，讓鏡片重新恢復它原本的曲度以及平整光滑，只留下一些比較深的點狀傷痕沒有拋除

最後四張試拍照 兩兩對比，都是全開光圈f/2.8的時候拍的，可以清楚看到 拋光前、後的成像有非常顯著的差異。這支鏡頭在拋光後的成像 全開光圈就已經是清晰銳利，我察覺不出跟正常的鏡頭有差異

透過拋光的方式，拯救了一支原本要被廢棄的鏡頭！

When the guest brought me this Canon FD 300mm f/2.8 L lens, one of the inner elements had been rough-ground for unknown reasons, resulting in a very rough and uneven surface that prevented the lens from producing clear photos. Regardless of whether shot at wide-open aperture or stopped down to f/8.0, the images were always blurry.

I followed traditional polishing methods, creating a polishing mold, and carefully polished the lens, removing most of the rough surface and restoring the original curvature and smoothness of the element, while leaving some deeper point-like scratches untouched.

In the end, I took four test shots, paired for comparison, all shot wide open at f/2.8, clearly showing a significant difference in image quality before and after polishing. The images with the lens after polishing were sharp and clear even at full aperture, and I couldn’t detect any difference compared to a normal lens.

Through the polishing process, I salvaged a lens that would have otherwise been discarded!

LEICA SUMMILUX-M 50mm f/1.4 E46 Pre-A 修復膠合鏡組霧狀脫膠離膠 Fixing hazy elements separation

這支LEICA SUMMILUX-M 50mm f/1.4 E46 Pre-A 的後內膠合鏡組有明顯的霧狀脫膠離膠的問題。 經過標準的重新黏合程序，便可以順利的將問題解決，讓鏡片恢復乾淨通透

脫膠離膠 是一個可以被完全修復的問題，鏡頭修復後的表現也會跟原本鏡頭一樣，不會有差異

霧狀的脫膠離膠，是這款LEICA SUMMILUX-M 50mm f/1.4 E46 Pre-A的通病，如果您有這款鏡頭，可以在檯燈下檢查看看內部鏡片是否有霧，也可以將鏡頭接上相機，在前方有光源的情境之下拍幾張照片，檢視光源周圍是否有朦朧的光暈溢出，如果有明顯的光暈在光源周邊，您的鏡頭很可能就有這樣的問題

請參考最後兩張這支鏡頭維修前後的試拍照，這兩張試拍照的相機設定都一樣。我特別在試拍場景中放置了幾盞對著 鏡頭和相機 照過來的燈源，模擬逆光拍照的環境。 鏡頭如果有明顯的霧，在逆光環境之下拍出來的照片 會有霧矇矇的，特別在光源周邊特別明顯，鏡片越霧越明顯；相反的，如果鏡片乾淨通透，拍出來的照片也會乾淨明亮，光源周圍只會有很輕微的溢光，整體色彩表現是乾淨的，也會有足夠的色彩反差與飽和度！

如果你的鏡頭有類似的問題，歡迎直接跟我聯絡！

The rear internal cemented doublet of this LEICA SUMMILUX-M 50mm f/1.4 E46 Pre-A shows a noticeable fogging issue due to elements separation. This problem can be totally resolved through a standard re-cementing procedure, restoring the lens back to a clean and clear condition.

The elements separation is an issue that can be completely repaired, and after the lens is restored, its performance will be identical to its original, with no differences.

The foggy separation is a common issue with this model LEICA SUMMILUX 50mm f/1.4 E46 Pre-A. If you own this lens, you can check under a desk lamp to see if there is any fog inside the lens. Additionally, you can attach the lens to a camera and take a few test in a situation where there is a light source in front. Examine the images for any hazy halos around the light source; if there is a noticeable halo around the light source, your lens may likely have this issue.

Please refer to the last two test shots of this lens taken before and after repair. The camera settings for both test shots are the same. I specifically included several light sources directed at the lens and camera in the test scene to simulate a backlighting environment. If the lens has significant fog, photos taken in this backlighting condition will exhibit fogging, particularly noticeable around the light source — the fogginess becomes more pronounced with increased haze. Conversely, if the lens is clean and clear, the resulting photos will also be clean and bright, with only a slight flare around the light source, and the overall color performance will be clear, exhibiting sufficient color contrast and saturation!

If your lens has a similar issue, feel free to contact me directly!

LEICA TRI-ELMAR-M 28-35-50mm f/4.0 ASPH. E55 SILVER MATE 11894 鏡片清潔 解決調焦對焦不順 移焦校正 Cleaning, Lubrication and Adjustment; CLA

這支漂亮的 LEICA TRI-ELMAR-M 28-35-50mm f/4.0 ASPH. E55 MATE 11894 銀鏡 有以下幾個問題，已順利解決～

1. 鏡片有薄霧髒污 清潔
2. 對焦與變焦的手感不順 完全拆解調整
3. 連動對焦焦點偏移 需要調焦

This beautiful  LEICA TRI-ELMAR-M 28-35-50mm f/4.0 ASPH. E55 Silver MATE 11894 had a few issues, all of which have been successfully resolved:

1. The lens had slight fog and dirt internally, and I made a cleaning. 
2. The focus and zoom rings felt rough and uneven, so a complete teardown and adjustment was performed.
3. Rangefinder coupling focusing was not accurate and I made a recalibration.

Contarex Carl Zeiss Planar 85mm f/1.4 T* 鏡片清潔 對焦環重新潤滑 Cleaning and Lubrication, CLA

這支 牛眼相機的 Contarex Carl Zeiss Planar 85mm f/1.4 T* 保養的項目是 全鏡鏡片清潔 以及 對焦環重新潤滑

The maintenance items of this Bullseye camera lens Contarex Carl Zeiss Planar 85mm f/1.4 T* are Cleaning all the lens elements and Lubricating the focusing helicoids.

Canon FD 50mm f/1.2 霧狀脫膠離膠重新黏合 Fixing the hazy elements separation

這支 Canon FD 50mm f/1.2 的後膠合鏡組 有常見的脫膠離膠的問題。鏡組取出後，依照標準處理程序，便可以將問題解決。 脫膠離膠在這款鏡頭上很常見，如果你的鏡頭有霧霧矇矇的狀況，可能就要評估是否有脫膠離膠的問題了。 脫膠離膠的問題，在正確的維修之後，鏡頭表現可以恢復原本的狀態。 維修脫膠離膠，只會將原本受損變質的膠去除，再重新上膠，是不會傷到鍍膜的！

This Canon FD 50mm f/1.2 lens has a common issue with the rear cemented lens doublet separation. After took out the lens doublet, the problem can be resolved by following standard repair procedures. This issue is quite frequent with this lens—if your lens appears foggy or hazy, it may be due to separation of the cemented elements. With proper repair, the lens’s performance can be fully restored. Fixing lens separation involves removing the degraded glue and reapplying new optical glue, without damaging the lens coating in any way.