[ricky23cheng]

All C Hing, why I can only have maximum f3 when I using the said lens on my D80, instead of f2.8? Thx.

[ricky23cheng]

Help Help!!!!! All C Hings

[ricky23cheng]

help

[Philippe]

在近攝時,有效光圈係會縮小的,越近越細,影遠野先用到f2.8,這是微距鏡的特性

[ricky23cheng]

Philippe c hing or 各路c hing:

影遠野都唔OK, 用吾到f2.8, 有咩特別setting ?

小弟新手一名，問到吾清唔楚，莫見笑。小弟支係cheap 鏡Sigma 24mm f2.8恆定光圈舊鏡
www.dpchallenge.com/lens.php?LENS_ID=1377
點解用係D80度最大光圈只得f3?
請賜教。