[mr. chan]

請問各位暗角是如何形成？怎樣避免？有冇相片例子呢？

[tam_dominic]

以下節錄自 "攝影基礎訓練" Notes, 歡迎索閱
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5. 點解影相出來會有黑角呢?

A. 鏡頭設計未如理想, 特別在廣角時會有黑角出現. 收細光圈可以改善.

B. 鏡頭4角光線被以下遮擋 :
1. 濾鏡框, 改用薄裝可能有改善
2. 遮光罩
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Happy shooting !

[ACanonGuy]

暗角 sometimes can be caused by the lens. For example my Canon 17-40mm wide angle does that from time to time. In that case it can be adjusted in post processing in some degree. I use Lightroom for that and it works pretty well.

[lokism3]

The C hings are talking about "vignetting" and physical obstacles of lens.

On the other hand, quality of the photo sensor may also related to 暗角. No matter CCD or CMOS type of sensor in your camera is using, or full-frame or not; 暗角 exists due to manufacturing process, you may see it especially under high key situation.

[KALKAL]

物理問題, 始終光線通過鏡片時, 會有若干的散失.
鏡頭設計越好, 鏡片質素越高, 暗角問題越小.

亦如以上CHING所講, 厚身的FILTER(UV等), 會加重暗角的問題.
越廣角的鏡頭, 或 光圈越大的鏡頭, 暗角也相對較嚴重.

收細光圈, 可以改善問題. 一般收2級左右已OK.

不過, 後製可能更方便. 而且近期的機身已內置暗角加光的功能了.

[mr. chan]

十分多謝各位指導。