[Daph]

小妹用緊550d..想買支鏡代替kit...buget $3500以內...請問以下3支揀邊支會好d??

1) sigma 17-70mm f2.8-4 dc os macro hsm
2) sigma 18-50mm f2.8 ex dc macro
3) tamron B005 (17-50mm f2.8) VC

1果支最好係有50-70mm段..但係f2.8只係17-18mm有....2果支無os...3果支有晒vc 有埋2.8恆定...但係龍仔色比sigma d色好似淡d...我見過d sample,,比起支17-70mm,,佢d色係無咁濃...(唔知係咪小妹搞錯..新手莫見怪)

其實如果有錢...我會揀sigma 17-50mm f2.8 ex os hsm,,不過宜家無...所以麻煩 師兄師姐幫我手諗下! ^^

[火Ken]

需然我未用過呢三支鏡，但係第三支無防震我用過，支鏡色係ok…其實呢段17-70有無防震真的大幫助…可能男仔夠力啦，個如果揀會揀第三;因為有17mm啦，有防震啦，最好就係有恒定2點8光圈可用，可能我對Sigma無咩好感(個別鏡頭)，所以我投Tamron…但如果有朋友對鏡頭認識多…副廠鏡入二手就相宜D啦！

[Mr.CK]

sigma 17-70 os 唔錯ga ! 好方便色會比較艶唔知好定唔好, 個Marco仲好好玩.

[Daph]

火Ken師兄: 多謝你的意見...sigma最怕係走焦...tamron好似無咁嚴重! 而且我係新手...都唔係好識得試...cal的話又怕最後係前段準後段唔準..的確b005係好似最好! 有晒我既要求..但我其實又鐘意sigma d色多少少...好矛盾

Mr.CK師兄: 其實恆定重唔重要?? 我想要大光圈..but lee 支得17-18mm段有...色彩艷得黎會唔會好假?? thanks! ^^

[kingsnake_8000]

17-70我用左幾個月, 我個支走前左30mm .cal左返o黎就靚晒！個人認為恆定唔係好重要. 因為1770 F2.8時其實好"散".,畫質一般都用f4 或以上先靚. 17-19先有2.8 . 只係唔用閃光燈時"救急"用.你當佢係恆定F4算啦.至於色水.個人認為色彩鮮得黎算o岩o岩好.有D n記FEEL但又同24-105L比.又淡少少.

[Daph]

kingsnake_8000 師兄: 之前都睇過你篇心得呀, 寫得唔錯呀! ^^
LEE支我都會考慮..因為個人偏好Sigma d色水 (比較龍仔)...
睇黎可以唔洗諗18-50mm果支lu,,淨返b005 定17-70os!...煩少一樣...XD

[nes]

3) tamron B005 (17-50mm f2.8) VC is good choose
只係暗位對蕉慢d

[Daph]

nes師兄: 暗位對焦慢我信好多鏡都有咁既問題呢...17-70os都會。除左lee樣...佢有咩比simga更好呢? 請指教啊...因為我宜家就係想知邊支會優勝d! 明白無可能4全其美...即恆定2.8+17-70焦段+防震+色水濃...所以要有取捨! thanks!~

[canon550d]

焦段, 一支去到50, 一支係70, 勤力D, 走多一兩步又得, CROP相又得, 1800萬像的好處

我就唔覺兩支色水差別好大, 點都大唔過PICTURE STYLE的分別吧

F2.8 在 最WIDE端, 因焦距問題, 散景唔會好散架咋, 又要WIDE又要散就要玩定焦, 恆定值錢的地方就係50MM時F2.8的散景, 當你見到甜美的圓點散景時, 就值回票價,

我就會唸B005, 恆定2.8 於室內好重要, 光圏夠大對焦問題都冇咁大
B005的創作空間大D, 原來跌左咁多價, 算抵玩
由A16帶去B005, 解像度高

[Daph]

canon550d師兄: 多謝你的意見...非常詳盡! ^^ b005新價$3850到...二手既around $3100-$3300到...我覺得幾抵玩!

[canon550d]

係呀, 比原廠差個USM, 但有齊2.8 和 IS, 3000零蚊去邊搵!
550D身上USM只係變焦冇咁大聲, 係發揮唔到真正力量
我冇數據支持我呢個講法, 不過我親身感受過, 將支原廠17-55 F2.8放在550D和7D上, 係完全兩回事, 放心, 只要B005唔走焦, 必定夠用! 仲要係好用!
又輕D, 放大率好高D, 最近對焦距離又近D, 鏡又細D, 又短D, 又連HOOD, 防震又高一級, 原廠一半價錢! 冇野講...

[cowpang]

我都諗左好耐
最後決定買支二手17-40L

真係好正

[Daph]

canon550d：哈哈...師兄..比你講到我即刻想買呀!! 諗諗下...真係走前2步都彌補到50-70mm段...仲要恆定2.8...真係好good!

cowpang師兄: 我諗我未有資格玩L鏡住...而且2手都唔平!~ 玩下副廠先...之後先一級級上!~

[william_yeung19]

以下兩個homepage
都指出B005 最大光圈邊緣成象比 A16 差:

http://www.photozone.de/

The Tamron AF 17-50mm f/2.8 XR Di II LD Aspherical [IF] VC is a very promising lens based on its sheer specifications. However, it falls somewhat short of the high expectations especially when considering the excellent performance of its non-VC variant. The biggest weakness of the lens is the rather soft corner/border performance at large aperture settings.

http://www.the-digital-picture.com/

Overall, the Tamron 17-50mm non-VC lens is sharper, has less vignetting, has a similar amount of CA and has less barrel distortion on the wide end but more pincushion distortion on the long end. The non-VC 17-50 is a bit smaller and lighter.

VC 值唔值/ 有冇用見仁見智
不過我個人認為既然550D 高ISO表現不俗
不必為VC放棄成象

[Daph]

william_yeung19師兄: 不過都有人話其實off左vc..佢係sharp過A16,,只係夜景既時候vc係輔助...