[問題]請問sigma super wide II 24mm是c/y接環嗎
各位好
因發現家裡有這顆老鏡頭sigma super wide II 24mm/F2.8
(圖片參考：http://ppt.cc/OYAC )
查了資料後似乎是c/y接環
有幾個問題油然而生：
1.因想轉接到GF3上，是否只要買c/y到m4/3的轉接環就可以了？
2.若轉接到m4/3的話，其等效焦距是12mm還是48mm??
因為m4/3轉換成FF的焦距時是乘以2
那照理講FF的鏡頭轉m4/3應該是除以2才對
為啥我會查到有人一樣是乘以2 ?? 這令我百思不解...囧rz
3.因他有手動光圈的功能，是不是買最便宜的轉接環就可以了？
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