[rickwok]

原先想買 18-50mm，但發現17-35mm可配合full-frame，好似抵買D，價錢又比18-50mm平少少。
請買2支比較買邊支好D？
50mm或35mm我無乜所謂，反而想知18mm和17mm分別有幾大？
我用300D

[ckso]

In terms of 135 film size
17 x 1.6 = 27.2
18 x 1.6 = 28.8
Not much difference.
If you have film camera of full frame DC eg. Canon 5D/1Ds/1Ds MkII etc.. you can consider 17-35.
For 18-50, full range is F 2.8 and give you extra 30mm for portriate shot.
35 x 1.6 = 56
50 x 1.6 = 80
so you have to think which suit you most.
P.S. 17-35 is HSM which focus fast and silent.

[rickwok]

多謝ckso的詳細解答！
想再問下2支比較畫質如何？邊度買會好D？水貨OK嗎？

[ckso]

You can check the MTF charts at Sigma web site. Both lens incorporate aspherical and SLD lens element in design. I would say not much difference.
I usually but shui goods for Sigma.

[Omega]

Sigma 17-35 DG EX HSM 我有, 用左年幾......畫質其實唔差的﹐
不過要收少少光圈啦。我自己影一般用f/5.6~8, quality好滿意...
光圈開盡的話畫質就會少少散同有暗角。

當然以規格計只係平鏡一支﹐又可以菲林數碼兩用﹐
仲想點....

[wlachan]

應該係 18-50/2.8 EX DC。

[rickwok]

請問去邊度可買到sigma水貨？17-35mm價錢如何(行/水)？謝！

[Omega]

天祥

我一年半前買$2900....而家可能貴少少。

[rickwok]

thanks!
有無人知sigma17-35mm 行貨要幾錢？

另外想問下sigma 10-20mm幾錢(行/水)？