[photog]

拍攝了3張相，分別是使用EF 50/1.4, EF 50/1.8和Sigma 28-70mm/2.8在20D上，再張中間放大，去色彩，沒有USM, f11光圈，單比較解像度。相片以a, b, c 命名，但沒有寫出那一張是那一支鏡拍攝，看看大家自不看出那一張是EF 50/1.4, EF 50/1.8和Sigma 28-70mm/2.8所拍攝的。

http://www.photocafe.hk.ro/topic.cgi?forum=63&topic=3&show=0

[HK2046]

can not load oictrues

what server

[photog]

Sorry about that. But all computers in our office can see the site very fast and clearly. Would u please check with your line.

[man1492]

Conducting test using the above parameters means that you definitely don't know what are the differences between the lenses. That is.

[hktsoi]

以上的測試並不是很科學化，很嚴謹的。不過指出一個很重要的訊息，就是任何一支鏡都可以拍攝出高質素的影像，問題是使用者如何使用。如果拍攝不到高質的相片，會否先考慮是否自己的攝影問題，而不是一開始便覺得是鏡頭，相機的問題？

[老叟]

我就話支支差唔多者

[hsc]

為何不set到去f2.8去比呢???

[galleo]

"以上的測試並不是很科學化，很嚴謹的。不過指出一個很重要的訊息，就是任何一支鏡都可以拍攝出高質素的影像，問題是使用者如何使用。如果拍攝不到高質的相片，會否先考慮是否自己的攝影問題，而不是一開始便覺得是鏡頭，相機的問題？ "

Since you are comparing them with f/11.It's like comparing the noise performance of two DC with ISO 50 and infering that both DC are performancing very well in terms of noise control.
Very much of the value of an "high" lens goes to big aperture.
Also, resolution is just one of the factors. What about Abbrevation? Fringing? Weight? circular aperture?Color retention?