不知道5楼是用的4个中的那一个么，呵呵

估计又该加钱了

何不24-105/2.8L IS???!!!呵呵...

如果是全画幅机身24-70绝对好，24-70在非全画幅上表现不很好。24-105没用过不知道。

学习到不少
谢谢分享

好久没见仁兄了。^_^ 工作很忙吧。很少见到您的帖子了。
关于24-70/2.8，个人实在不敢恭维。可能也是受photozone.de上评测的影响，而且在一位卖器材的朋友聊天的时候，他也提到，Canon的24-70的个体差异太大。有一些不错，有一些根本谈不上好。
前一阶段刚想换成35/1.4L，后来考虑到方便性，还是留下了。如果对画质要求高，又喜欢创造的朋友，建议还是上大光圈的定焦。绝对比24-70强很多。^_^
这个话题网上有很多讨论，以前曾经查过。
推荐楼主可以参考：
www.fredmiranda.com/reviews/
www.photozone.de
www.the-digital-picture.com

个人感觉，24-70真的没有必要加IS，70-200的IS，不需要的时候，都是关着。如果需要晚上出去拍片，肯定是要带架子的。70-200的IS，主要是为了应急的。^_^
24-70的70mm端的安全快门是1/70吧。这个限度一般达不到吧。^_^ 个人感觉没必要。

为什么会这样呢？是涉及上造成的吗？
photozone 上测试所有镜头可能都是在350D上吧。对24-70和24-105的评测都是在350D上。感觉只是对24-70颇有微词。^_^
为了节省各位时间。把部分内容转载过来。

------------------------------
24-105
Regarding its equivalent zoom range (39-168mm) on an APS-C DSLR the Canon EF 24-105mm f/4 USM L IS may not be the most sexy lens here but its performance figures are very impressive nonetheless. In fact the resolution results beat those from the EF 24-70mm f/2.8 USM L and match the EF 28-70mm f/2.8 USM L with its much more conservative zoom range (but higher speed). There's a slight decrease in performance at 105mm but even here the quality remains on a very high level. As to be expected from a modern Canon L lens the construction quality is up to pro standards matching its fasters cousins. The lower price tag plus the extra IS should compensate the slightly more moderate max. aperture for most users. Is it a perfect lens then ? Well, there're also downsides like pronounced barrel distortions and higher than expected CAs at the wide-end of the zoom range. However, the package remains extremely attractive if you can live with the rather unattractive zoom range on an APS-C DSLR - similar to other 28-xx or 24-xx zooms this lens is really more meant for 1.3x or FF (D)SLRs.

24-70

The Canon EF 24-70mm f/2.8 USM L proved to be a worthy representative of the pro grade lens league ... if you can get a good sample. During the last two years four lenses has seen the lab with only one within specs - this is disappointing especially for a lens of this price class. If you´re lucky enough to get a decent sample you can expect a very high performance level, especially when stopped down a bit. Distortions, vignetting and CAs are well controlled. The build quality is superb with only the reverse zoom extension as a minor downside. Even so the 24-70mm range is not all that attractive on APS-C DSLRs (39-112mm) - the EF-S 17-55mm f/2.8 USM IS is a better and cheaper bet except regarding build quality.


http://www.photozone.de/8Reviews/index.html

这才是镜皇啊，呵呵！

我也犹豫中……
不过觉的24～105mm挂机是个好头，再加个50mm F1.4就OK了。