[timhbf]

請問1個50mm,1個100mm定焦鏡,用同一光圈,影同一樣物件,例如同一個人全身照(攝距不同),邊個鏡影出黎會散D?
Thanks

[ks chung]

100mm

[koyi321]

點解係100MM呢？

如果我用Canon550D，配 50同100，都係100mm散景會散Ｄ嗎？
如果用洛FF機，效果係咪一樣？

[ks chung]

Yes!!!

[小小生]

影響景深有3樣野
焦距越長,光圈越大,對焦距離越短,景深越淺

[h0001244]

If you use 50mm at 5m F2.8 and 100mm at 10m F2.8, they will give you the same background blur.

If you keep the distance with object, then 100mm would be easier to get blur background.

[九龍人]

冇錯係只要放大率同光圈值一樣景深就係一樣.但係長焦距鏡頭會將矇咗既背景拉大.變咗背景睇起來會比較化.

[Marksman01]

呢度有講

http://www.dcfever.com/forum/read.php?f=12&i=90115&t=90115&phorum_auth=7f10e6291bc26cfcec4d218500516668

[koyi321]

明白曬，多謝咁多位既解析^^