原文由 鸡蛋 在2010-06-09 02:25发表
由此看见索尼的公关费用是何等的紧张，不就少喝了几瓶红酒么？用得着这么清醒么？

原文由 林落尘泥 在2010-06-09 02:18发表
“说720G比副厂死马/腾龙贵，而且没有尼康的DZP II（虽然更贵）的性能好。”

跟比它差的比价格，跟比它贵的比性能。这难道不是赤果果的黑么？

那我也可以倒过来说啊：720G比起腾龙死马的同档次镜头（虽然便宜点）表现好，而且比尼康的DZP II便宜。。。。

原文由 龘 在2010-06-09 02:05发表
再看最后的综合评价

it's at least a match for the more recent third party options from Tamron and Sigma, and only just outperformed by Nikon's very latest (and pricey) 70-200mm F2.8 VR II.

“说720G比副厂死马/腾龙贵，而且没有尼康的DZP II（虽然更贵）的性能好。”

跟比它差的比价格，跟比它贵的比性能。这难道不是赤果果的黑么？

那我也可以倒过来说啊：720G比起腾龙死马的同档次镜头（虽然便宜点）表现好，而且比尼康的DZP II便宜。。。。

原文由 林落尘泥 在2010-06-09 02:11发表

两篇测评我都是通读了的，你说的我都看到了。比如720G的最后一条缺点：比起副厂镜头来说太贵了，这不是P话么？难道这句话对泥康佳能不适用么？
至于其他两点缺点，我也不反驳，但这种东西都是各有千秋的。
小白is也说得焦外不好，抗眩不好，不是么？
我不是要在此说明sony Canon谁好，只是给大家看看差不多的东西，测评 ......

原文由 龘 在2010-06-09 01:58发表
看看720G有啥缺点吧

看看720G有啥缺点吧

Conclusion - Cons
A bit soft wide open at the telephoto end on APS-C
No dust or moisture sealing (which we'd expect in a 'Pro' level lens)
Slightly suspect image quality at closest focus (very soft indeed at F2.8)
Extremely expensive compared to third party alternatives

1,3是画质方面的,2是结构方面的,最后一个是价格方面的,尤其是没有内建防抖组件和没有防水防尘密封,成本应该更便宜

The Sony 70-200mm F2.8 G is without doubt an excellent lens. Don't be fooled by the fact that it's based on a 7-year old Minolta design - it's at least a match for the more recent third party options from Tamron and Sigma, and only just outperformed by Nikon's very latest (and pricey) 70-200mm F2.8 VR II.

Optically it's therefore very good indeed, being impressively sharp at most settings, and with chromatic aberration, distortion and vignetting all rather low. The bokeh (or rendition of out-of-focus areas of the image) is also very smooth and attractive most of the time. About the only possible criticisms are that it can look a little soft at 200mm and F2.8 when used on APS-C cameras, or at distances close to minimum focus.

Operationally the lens is impressive too. The build quality is right out of the top drawer, and the autofocus is fast, near-silent, and accurate. The tripod ring design isn't our favorite though, as you can't remove it without detaching the lens from the camera; this can make rapid switching between hand-held and tripod-mounted shooting a bit more awkward than with some other systems. But on the other hand the lens hood is excellent, being suitably deep to provide optimum protection from flare, and sporting a small window with a sliding cover to allow the easy operation of polarizing filters.

One notable absence from the spec sheet, however, is dust- and water-sealing; for example the lens lacks a gasket around the lens mount to seal this point of vulnerability. This is disappointing for such an expensive, and otherwise superbly-made lens, and stands in contrast to the fast telephoto zooms from other camera manufacturers (such as the Canon 70-200mm F2.8 IS, Nikon 70-200mm F2.8 VR II, the Olympus 35-100mm F2, and the Pentax 50-135mm F2.8).

This brings us on, rather neatly, to the slightly vexed issue of value - because the biggest problem with the Sony 70-200mm F2.8 G is that it costs well over twice the price of its Sigma or Tamron equivalents. Of course this buys you that bulletproof metal build, and optics which are certainly better - but not necessarily by all that much. And whereas in Nikon or Canon land you get both environmental sealing and image stabilization for your money, with Sony the situation is rather different, as all lenses effectively gain stabilization though the in-body Super SteadyShot system. This means that the functional differences between the Sony and its cheaper competitors are very small indeed; however the Sigma's not as sharp, according to our tests, and the Tamron doesn't have ultrasonic focusing.跟我前面说的一样,成本比XZP那些低

So, overall, the 70-200mm F2.8 G is the ideal lens for Alpha users who want the very best optics and focusing in a fast telezoom regardless of price. In particular it's a superb companion to both Sony's high resolution full-frame DSLRs, and enthusiast APS-C bodies such as the Alpha 700. The Sigma and Tamron equivalents run it very close indeed at a fraction of the price, and are well worthy of serious consideration for those on a tighter budget; but overall the Sony wins out over these for its all-round excellence.

原文由 龘 在2010-06-09 01:48发表
楼主用翻译软件翻译的?

但是它比起死马和腾龙的基本上一样水平的镜头要贵太多了。

但是它比起死马和腾龙的基本上一样水平的镜头要贵太多了。