新的Nikkor AF-S 24-70mm f/2.8G ED

Nikkor AF-S 24-70mm f/2.8G ED Review / Quick Test Report

11/11/2007 © by Klaus Schroiff
Lens kindly provided by Gustel Schrempp!

Introduction

Newly designed full format lenses weren't overly popular on the Nikon side of life lately but the release of the new Nikon D3 seems to have shifted the priorities again. The Nikkor AF-S 24-70mm f/2.8G ED is the first of a whole series of new professional grade full format lenses. It is obviously a replacement for the "old" AF-S 28-70mm f/2.8 ED D (released in 1999). Apart from the highly useful extension at the wide-end of the zoom range the new lens features a reduced minimum focus distance and Nikon's latest development in coating technology, Nano Crystal Coat, which is supposed to suppress internal reflections and ghostings. Typical for all new Nikkors it is a G-type lens so it doesn't offer a dedicated aperture ring anymore.
Eventually you'll see full format lens tests here at photozone but the current priority is still on APS-C format sensors and within this scope the field of view of the AF-S 24-70mm f/2.8G ED is equivalent to a classic "36-105mm" lens . The lens may loose quite a bit of its wide-angle appeal here but it is certainly more usable as a standard zoom than the old AF-S 28-70mm f/2.8 IF-ED D (equivalent to "42-105mm"). http://www.photozone.de/8Reviews/len...470_28/kit.jpg
Over the decades Nikon earned a reputation of manufacturing lenses with a higher than average build quality and the AF-S 24-70mm f/2.8G ED does certainly deliver here. It is a truly professional grade zoom lens thanks to a tough metal lens body and smoothly operating control rings. As you may notice in the product shots below the lens (its inner tube) extends significantly when zooming towards the wide end of the zoom range and a tiny bit towards 70mm. The shortest physical length is reached around the 50mm setting. This may sound odd but it is actually quite typical for fast Nikon (and Canon) standard zooms. The supplied petal shaped hood can be attached to the outer lens barrel thus providing a near-optimal protection at all focal length. The physical length with attached hood is constant.

http://www.photozone.de/8Reviews/len...70_28/lens.jpg
Thanks to an IF (internal focusing) design the front element does not rotate so using a polarizer is no problem (unless you attach the lens hood). Like all modern Nikkors it features a silent-wave (ultrasonic) AF motor providing extremely fast and near-silent AF operations. The AF accuracy of the tested sample was exceptional.
Specifications Optical construction15 elements in 11 groups inc. 3x ED elements, 3x aspherical elements and 1x Nano Crystal Coat Number of aperture blades9 (rounded) min. focus distance0.39m @ 35-50mm (max. magnification ratio 1:3.7) Dimensions83x133mm Weight900g Filter size77mm (non-rotating) HoodNikon HB-40 (supplied), petal-shaped Other featuresRubber mount seal

Distortions

Similar to its predecessor the AF-S 24-70mm ED exhibits a very slight degree (~1.1%) of barrel distortions at 24mm decreasing to marginal pincushion distortions beyond. This is exceptional for a standard zoom lens (on an APS-C DSLR). Please note that some users reported that the lens seems to produce a quite hefty amount of barrel distortions at 24mm when used on a full format DSLR.

Move the mouse cursor over the focal length text marks below to observe the respective distortions 24mm 40mm 70mm http://www.photozone.de/8Reviews/len...distortion.png The chart above has a real-world size of about 120x80cm.


Vignetting

Thanks to its full frame design the Nikkor AF-S 24-70mm ED shows very little vignetting on the D200. At 24mm and 40mm the issue is already negligible at wide-open aperture. The problem increases marginally towards 70mm but it is still not really field relevant here even at f/2.8. http://www.photozone.de/8Reviews/len...vignetting.gif

MTF (resolution)

The AF-S 24-70mm f/2.8 ED produced very good to exceptional resolution figures in the MTF lab. The center resolution is excellent to outstanding throughout of the tested aperture range. At 24mm and 40mm the center resolution is likely to match and possibly even exceed a 10mp sensor resolution and that's also at f/2.8 which is quite amazing. The borders aren't quite as impressive but still very good at large apertures and excellent at medium aperture settings. There's a slight drop is quality at 70mm but even here the lens is darn good. On the downside the field curvature is fairly pronounced at 24mm so you need to stop down sufficiently when shooting flat objects at this setting - otherwise your background will run out-of-focus (depth-of-field). The tested sample showed a very good centering quality. Below is a simplified summary of the formal findings. The chart shows in line widths per picture height (LW/PH) which can be taken as a quantity for sharpness. The chart is limited to the visually relevant LW/PH range of [750, 2250]. If you want to know more about the MTF50 figures you may check out the corresponding Imatest Explanations.
http://www.photozone.de/8Reviews/lenses/rating_d200.gif http://www.photozone.de/8Reviews/len...470_28/mtf.gif

Chromatic Aberrations (CAs)

On the average chromatic aberrations (color shadows at harsh contrast transitions) are comparatively low for a standard zoom lens. Unfortunately the CAs were a bit unsymmetrical in the tested sample making it difficult to remove all CA traces via post-processing. http://www.photozone.de/8Reviews/len...2470_28/ca.gif

Verdict

The Nikkor AF-S 24-70mm f/2.8G ED exceeds the already very good performance of its predecessor. The center quality is nothing short of outstanding matching or beating the resolution of a 10mp APS-C sensor. The border quality is very good at large aperture increasing to excellent levels at f/5.6-8. However, you've to be careful with the curved focus field at 24mm which can result in out-of-focus background corners! Distortions and vignetting are very low and not really field relevant. Chromatic aberrations are generally well controlled although they could have been somewhat more symmetrical (in the tested sample). The bokeh (out-of-focus blur) is unusually smooth and buttery for a zoom lens with aspherical elements. Please note, however, that 70mm f/2.8 isn't terribly fast on an APS-C DSLR so you've to be fairly close to your main subject in order to produce a pronounced out-of-focus blur. The build quality of the lens is superb and it´s a joy to handle it in the field despite its comparatively hefty size and weight. The high speed and low noise of the silent-wave AF drive is the cream on top of it all. The primary aspect which can spoil the game is, unsurprisingly, the high price point of around 1500€/US$.

这分辨率真是爆棚阿

哈哈哈哈和啊哈和

D200好可爱阿！！！！

买吧买吧

没钱

要买先买50 1.4

引用:

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作者: outuo

买吧买吧

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引用:

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作者: heavywind

没钱

要买先买50 1.4

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这支镜头我迟早拿下

你要50 1.4干什么？

这只镜头竟然比CANON 24-70L USM贵500欧

就是想看看定焦的多牛

引用:

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作者: outuo

你要50 1.4干什么？

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引用:

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作者: heavywind

就是想看看定焦的多牛

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定焦要用牛，也要牛人用啊

我靠，我们真无聊

知道你是牛人

看不起我们

引用:

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作者: outuo

定焦要用牛，也要牛人用啊

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引用:

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作者: heavywind

知道你是牛人

看不起我们

---

我离牛人还有个十万八千里，都快被骂死了
再努力个十年吧

行阿，不小心露馅了吧

就否认第一句

不否认第二句

就否认自己不是牛人

不否认看不起我们

或者是就看不起我一个

引用:

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作者: outuo

我离牛人还有个十万八千里，都快被骂死了
再努力个十年吧

---

等着呢，说话

默默唧唧的

爷们点行不？

有什么想法直说

引用:

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作者: heavywind

行阿，不小心露馅了吧

就否认第一句

不否认第二句

就否认自己不是牛人

不否认看不起我们

或者是就看不起我一个

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哈哈
你个死人
大家都是初学者，有什么看得起看不起的。
你手中的器材可以笑傲维也纳了都

引用:

---

作者: heavywind

等着呢，说话

默默唧唧的

爷们点行不？

有什么想法直说

---

我去洗澡了

你说的，相机后边那个头更重要

没错，确实重要

那你说，我说要买个镜头，你冒出来一个相机后面那个头更重要

你说，别人来了怎么想？

引用:

---

作者: outuo

哈哈
你个死人
大家都是初学者，有什么看得起看不起的。
你手中的器材可以笑傲维也纳了都

---

引用:

---

作者: heavywind

你说的，相机后边那个头更重要

没错，确实重要

那你说，我说要买个镜头，你冒出来一个相机后面那个头更重要

你说，别人来了怎么想？

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晕，这个是别人说我的。
而且我觉得说的很对啊

我改了，刚才没写完，按错了。

引用:

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作者: outuo

晕，这个是别人说我的。
而且我觉得说的很对啊

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我刚刚在欧拓群说要买24-70，直接被一群女人骂死，唉。

动心了...24-70加70-200.

忍住,直接上哈苏!