## 什麼是感光元件(CMOS)? 感光元件為相機曝光的位置,隨著感光元件大小分為以下等級  ## 全片幅與APSC差別 | | 全片幅 | APSC | | -------- |---------- | ---- | | 大小 | 大 | 小 | | 等效焦段 | 以此為基準 | x1.5 | | 躁點 | 少 | 多 | **全片幅鏡頭可以用在APSC機身上** **APSC鏡頭可接上全幅鏡頭但成效多會有暗角**
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