转自DPREVIEW网站.
I picked up my K-5 on the 1st November and it is now time for some conclusions.

This summer, as I was taking more and more photos of sport events, I finally took the plunge and bought a Nikon D700 and D3s with AFS 24-70/2.8 and AFS 70-200/2.8 VR2. These cameras, especially the D3s, do not play in the same league as the K-5, but beside the K-7, they are my only point of comparison.

In October, I went to Uganda and needed a camera with high iso capabilities, as the K-5 was not available at that time, I took the Nikon equipment in addition to a K-7 with DA*300. Another reason for taking both systems is to be able to compare the performance in the fields of both systems.

Travelling with two systems is not ideal, additional weight for chargers and batteries, swapping lens involving swapping body as well, not ideal. I came to the conclusions that further trips will be done with only one system. When I came home, I was nearly ready to leave Pentax for Nikon. The main thing refraining me from switching to Nikon was that for wildlife photography, the Nikon equipment does neither offer what I want (there is no 200/2.8, but a much heavier 200/2, the 300/4 is neither weather sealed nor stabilized) nor offer something within budget and weight (200-400 or 300/2.8). Thankfully, the first user feedback having received the K-5 looked promising. I decided to get a K-5 and check it out. It may not reach the performance of the D3s, but be good enough for most of my photography.

Well, as said, I received that K-5 on the 1st November and after nearly 1000, time to take time to come to the conclusions.

AF

The autofocus of the K-5 has been greatly improved compared to the K-7. The raw speed when using SDM lenses did not change, but there is much less hunting in low light. The raw speed with traditional AF lenses improved as well, making lenses such as the FA*85/1.4 fast enough to follow running people.

That said, the AF is still behind the Nikon system. There is especially one thing I am missing from the Nikon system, it is the focus tracking with lock-on.

For sports photography, I will stay with the D3s/D700 combo, but for the other applications, the AF of the K-5 is good enough for me.

IQ

I am happy to find again the great colour rendition and richness of the Pentax DSLRs until the K10D before they changed to the Samsung sensor. The enhanced DR is really helpful to get back details in the darker area of the frame without getting just noise (like it was the case with the K-7).

In regards of noise, the K-5 is a great enhancement to the K-7. The K-5 is still around a stop behind the D700 and even more compared to the D3s, but it is a great performance for an APS-C camera.

In regards of white balance, the K-5 gives a little cold balance by default, but I prefer that compared to the yellow cast of the D700/D3s.

Exposure metering

The K-5 does, like all Pentax DSLRs, prefer to underexpose a little bit, while the Nikon's do prefer to overexpose. Apart from this difference, I find the exposure metering of the K-5 a bit more accurate and consistent than the one of the K-7.

In tricky situations, for example a bright red flower in front of a dark background, the metering of the K-5 is fooled as well as the one of the D3s. In such situations, I need to check the histograms by channels to make sure none is clipped. D3s and K-5 are pretty similar in such situations. The D700 shows its age in this regards, it is fooled, but needs much more exposure correction to avoid clipping.

Handling

The base K-5, as the K-7, is a bit too small for my hands, especially when using larger lenses. The grip does greatly improve the handling. In regards of weight, the K-5/K-7 do win over the Nikon.

In regards of menus, the menus of the K-5 has been slightly changed compared to the K-7, but I quickly found all I wanted. Comparing the menus of the K-5/K-7 and D700/D3s is unfair as I am much more used to the Pentax menus. I am still terribly lost in the menus of the D700/D3s. Some choices of Nikon do not look logical to me.

The manual setting of the WB is a major plus on Pentax. You take a photo, go into the menu and go either through the presets, or go manually and change the values while seeing the result immediately on the back LCD screen. On Nikon, it is just a matter of trial and error, you take a photo, check the result, change the setting and start again until you have the right settings.

Conclusions

K-5

Well, this K-5 is a great improvement over the K-7, especially in color rendition, AF and high iso capabilities. While it does not reach the levels of the D3s, it is good enough for most of my photographic purposes. The advantage of size and weight compared to Nikon does make it my main camera.

D3s

The AF system is, especially with the AFS70-200/2.8, a very fast performer coupled with a frame rate of 9 images/sec and a buffer of over 40 RAW files, the ideal camera for serious sports photography. It will remain my main camera for sports photography (but will try the K-5 on an indoor sports event in one week).

The Nikon does also offer a huge variety of lenses, but then, Nikon really draws a large line to clearly separate the "amateur" lenses from the "pro" lenses. Weather sealing and image stabilizer are reserved for pro lenses.

最后的结论: D3s for sports, the K-5 for everything else
D3S拍体育. 其他方面K5就足够了.

这个要顶！

非常真实的评价，顶

While it does not reach the levels of the D3s, it is good enough for most of my photographic purposes.
对焦和高感肯定还是比不上全副机的。lz说的对，干活不要入p。其他都可以。

不错，基本跟之前对K5 的理解一致

K5家用太奢侈,干活又没CN给力，还是没有改变小众的定位。

我的英文很差，只看了个大意。

说实话，要说干活或养家，宾得真得不适合，

它适合悠哉悠哉地玩！

虽说K5出来了，对焦、高感天翻地覆的，还是提不起兴致，

如果宾得明年还是不出全幅，

留下K10D，双修吧！

宾得在对待全幅的问题上，真是不给喜欢宾得的兄弟们提气！

之前一直存钱要上50-135和适马50 1.4的，结果现在只上了适马50 1.4，如果明年年底不出全副，肯定上5d3了，如果5d3没上市，就5d2了，呵呵，反正k8出来也没兴趣了，除了全副都没兴趣，画质出到k50也赶不上全副。

从去年到今年11月份，有三位朋友请我帮忙去买机器，

一水的5D2+24105或2470。

买相机的伙计问我：大哥玩什么机器啊？我说：宾得。

小伙计说：机器不错，就是玩得不提气！

我现在也说：真的，真得太不提气了！！！