[問題] 減光鏡減得比實際還多
我裝了一片Marumi ND8鏡,用在F1.4的鏡頭上
機身是N家的,所以一裝上鏡頭就會自動開到最大光圈
結果用觀景窗發現裝了以後比不裝縮到F8作景深預覽還暗
理論上不是應該等同光圈縮到F4的亮度嗎?
可是實拍大約就真的是ND8的效果
這是怎麼回事?
是人眼跟CMOS感光的差異嗎?
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