[問題] 請教，EPL2 的等效焦距怎麼算？
研究許久 加上 跟版友們的討論，
覺得我的需求應該是 EPL2 + P牌 20mm/F1.7 + 14mm/F2.5
想知道這樣等效焦距怎麼算？
跟GF2 一樣是 x2 嗎？
謝謝！
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