[timhbf]

我用400D,已有17-40L,但影野個影唔夠淺,想問下以下邊支鏡影野淺d?

1) 50mm 1.4
2) 70 -300mm 4.0-5.6 IS

Thanks!

[lambertnh]

睇實際光圈大小

1) 50mm / 1.4 = 35.7mm
2) 300mm / 5.6 = 53.57mm

therefore 70-300 @ 300mm f/5.6 淺 d

[man1492]

50/1.4 is more easy to have for "portrait".

[beancurdbean]

影乜野先??
1) 影人 (唔可以太近又唔可以太遠) --> 50/f1.4 景深最淺
2) 影景影雀 (可以遠攝) --> 70-300mm 用300mm 景深最淺
3) 影細物品 (可以近攝) --> 任何一支macro影1:1, 景深最淺

想再淺d, 就要上FF, 例如5D