Pentax于今年5月20日正式终于推出了带高清摄像的顶级数码单反K-7，用以和同档次的Cannon 50D，Nikon D90竞争。秉承一贯轻巧紧凑的机身设计，加上丰富的功能和数项创新，K-7为严肃的摄影爱好者交了一份满意的答卷。现在Amazon和JR已经可以在线购买了，1299刀的价格还不是我可以承受的。等一年后品质稳定，价格降到700左右就是合适的出手机会了。
主要参数：14.6万像素CMOS，3寸LCD，77区测光系统，100% field of view的光学取景器，每秒5.2张的高速连拍，支持人脸识别和自动对焦的实时取景(live view)，以及最高分辨率1280×720，每秒30帧的高清录像(HD video)。
机身设计：明显比之前k10d, k20d小了很多，但是内部没有一点缩水：镁合金框架，全三防的设计(配合新出的WR防水镜头)，以及机身防抖和除尘机构。
特色功能
1) HDR，通过三张不同曝光的照片合成出一张拥有高动态范围的照片
2) Electronic level，数字水平仪，保证画面水平
3) Lens Correction，自动补偿画面畸变和色散，针对DA与DFA系列镜头
4) Composition adjustment，构图微调，无须移动相机本身，只利用机身防抖的部件平移或旋转CMOS一定量的微小位移，适合固定于脚架上的微距拍摄。
官方介绍视频
http://www.youtube.com/watch?v=BNCHdsZI88g
![MOODS OF NORWAY X [EXPLORE FRONTPAGE]](http://farm7.staticflickr.com/6104/6222457031_fa95a4c50e_s.jpg)
![Green Field [Explored]](http://farm7.staticflickr.com/6133/6200460871_6715d03255_s.jpg)
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Fats:
Windie Chai:
There is a serious limitation with K-7 that makes bulb exposures extremely difficult and tedious. It involves mandatory noise reduction which doubles every exposure.
Why is this a problem?
This affects nearly all my night time photography. I enjoy taking photos of star trails. For example, a 10 minute exposure will take a total of 20 minutes to complete.
I wanted to capture lightning, generally I will leave the shutter opened for a minute or more. It was so frustrating because I missed so many potentially great shots because the Pentax K-7 was busy doing its noise reduction! Why can’t I turn noise reduction off?
I shutting raw.
I talked to my Nikon and Canon friends and they are amazed. One spent 20 minutes flipping through menus, convinced that there must be a way to turn of NR. Finally, the complaints found on the pentaxforums confirmed this is a known problem.
Since this problem still exists with the K7 and there are no signs that Pentax cares to offer a solution, Pentax has lost me as a customer. I will be selling all my Pentax equipment on eBay by September, if I see no solution.
@joe, Sorry to hear that, but I think there must be a solution. Even the lowest end k-m has the options to set the noise reduction for slow shutter speed and high-iso. You can refer to these two sources for more information.
http://support.pentaximaging.com/documents/382
http://www.imaging-resource.com/PRODS/K7/K7A5.HTM
I can disable long shutter speed noise reduction for images up to 30 seconds (which should be enough for most). It is disappointing I can’t turn it off for longer exposures.