[raincoat_lam]

我想問兩支鏡光圈全開 F2.8 既時候
係咪會有成像唔夠銳利 ( 對焦中心點 ) 既情況呢 ? thanks

因為我個支係買二手 ~

近攝幾乎冇分別 ( f2.8 同 f4 ) 紅 logo 為對焦點

[img]http://i545.photobucket.com/albums/hh393/raincoat_lam/01_f2_8.jpg[/img]

[img]http://i545.photobucket.com/albums/hh393/raincoat_lam/01_f4_0.jpg[/img]


但遠攝的話 ( 1.5m ) 明顯 f2.8 的銳利程度大減 ... 請問是正常嗎 ?

全圖 :

[img]http://i545.photobucket.com/albums/hh393/raincoat_lam/02_f00.jpg[/img]

[b][size=4]f2.8[/size][/b]
[img]http://i545.photobucket.com/albums/hh393/raincoat_lam/02_f2_8.jpg[/img]

[b][size=4]f4.0[/size][/b]
[img]http://i545.photobucket.com/albums/hh393/raincoat_lam/02_f4_0.jpg[/img]

[raincoat_lam]

唔好意思，原來唔 support html code

[Raymondlife]

我係A16既用家...
遠攝用F2.8 一定係差左架喇..要收番光圈.. 到F4 會好番D.