自从尼康的D90开创了单反录像的先河，现在有很多单反支持标清甚至高清录像功能了，但是短片的格式不同。下面分品牌介绍：
尼康的D90、D5000、D300s的数码短片：Motion JPEG格式；
宾得的K-7：Motion JPEG格式，30fps；
奥林巴斯E-P1：AVI Motion JPEG (30fps)，1280 x720可录7分钟
佳能5DmarkⅡ支持：H.264，1920×1080约12分钟；500D为1920×1080 20帧/秒
松下GH1：有AVCHD和Motion JPEG两种
Motion JPEG每一帧都为JPEG编码，尺寸较大。
H.264或MPEG-4 AVC是高度压缩视频编码，可使用至多32个参考帧，广泛应用于高清电视。
AVCHD是索尼与松下联合发表的，基于H.264/MPEG-4 。
有DV产品的佳能和松下的单反中录像功能支持H.264，尺寸较小。
Never used canon dslr, it is not enough only looking the handbook. I want to use it in body. There isn’t bestbuy in beijing, so I went to the canon experience store last week. When you come out of the northwest entrance of the Xidan station, walk to northwest, the store is near by the Juntai department store. On corner of a building, the 1st floor laying out the DC and DV. The dslr locates in 2nd floor. Telephoto lens with 1ds mark 3 and 1d mark 3 are on two tripods. Other dslrs are behind of the show window. Special men serve nearby. The id card is your guaranty for using the camera and lens. There is no memory card in the dslr, you can only check the photo you shot one by one. Next time I will take my card.
I used the 5D mark Ⅱ with 70-200/4 100-400 85L, the 70-200/4 is very portable, large difference with 100-400 and 70-200/2.8. It is no wonder many people choose 70-200/4 instead of 70-200/2.8. After a few minutes, I am familiar with the body of 5d, it is very nice for using.
以前没有摸过佳能的机器，对佳能单反的一些设定光看说明书是不行的，想实际用下，北京没有百思买，于是上周末去了北京的佳能体验店，西单地铁西北口出了接着西北走，在君太百货西面，在个角上，两层，一层是便携数码相机和摄像机，单反在二楼。两个三脚架的大炮后面分别是大马三和小马三，其它机身都在玻璃窗里，有专门的工作人员看管，需要用身份证抵押，然后就可以任意组合镜头和机身了，不过机身里都没有存储卡，只能拍完一张看一张。太失算了，自己帯张就好了。
先后试用了无敌兔加xxb、db、85L，xxb非常轻便，和db差异明显，难怪很多都用xxb顶替xb。用用也就对佳能机身熟悉了，与nikon的机身差异挺大，但是也很好用。
| Canon 5D mark Ⅱ | Nikon D700 | |
| resolution | 21 megapixel | 12 megapixel |
| high ISO | Very good High ISO performance, almost as good as Nikon D700 / D3 | Class-leading high ISO performance |
| range of ISO | 50 to 25600 | 100 to 25600 |
| auto ISO | No selectable lower and upper limit | can set maximum ISO and minimum shutter speed |
| video | 1080P 30 fps | none |
| viewfinder | 98% coverage | 95% coverage |
| continuous AF | not as good as EOS-1 series or Nikon D700 | very good |
| JPEG output | a bit soft when viewed at 100% | |
| built-in flash | no | yes |
| Continuous shooting speed | 3.9 frames per second | 5.0 fps / 8.0 fps with optional MB-D10 |
| noise reduction | very high even ISO 400 | Well-balanced |
| auto-focus poin | 9 | 51, 15 cross-type |
| Spot Metering | center point | same as AF point |
I need the 70-200mm lens, canon has the 70-200mm F2.8 L IS USM and Nikon has the AF-S VR 70-200mm F2.8G, I prefer the D700, but the AF-S VR 70-200mm F2.8G is optimized for DX, 70-200mm F2.8 L IS USM is optimized for full-frame.
Ultimately, I hope Nikon to release the new version the 70-200mm lens. And at that time the price of D700 is cheap.
| Canon 5D mark Ⅱ | Nikon D700 | |
| 分辨率 | 2100万 | 1200万 |
| 高ISO | 非常好，接近 Nikon D700 / D3 | 领先 |
| ISO范围 | 50 – 25600 | 100 – 25600 |
| 自动ISO | 不可选上下范围 | 可设定最高ISO和最低曝光时间 |
| 视频 | 1080P 30 fps | 无 |
| 取景器 | 98% 视野 | 95% 视野 |
| 连续 AF | 不如 EOS-1 系列或 Nikon D700 好 | 很好 |
| JPEG 输出 | 100%时稍软 | |
| 内置闪光灯 | 无 | 有 |
| 连拍速度 | 3.9 张每秒 | 5.0 fps / 8.0 fps 加手柄 |
| 降噪 | ISO 400都减得太厉害 | 平衡 |
| 对焦点个数 | 9 | 51, 15 个十字型 |
| 点测光 | 中央点 | 与对焦点联动 |
我想用 70-200mm 镜头, canon有 70-200mm F2.8 L IS USM ，Nikon 有 AF-S VR 70-200mm F2.8G, 更喜欢 D700, 可是 AF-S VR 70-200mm F2.8G在 DX上表现非常好，全副上不是那么出色，四角失光较严重, 70-200mm F2.8 L IS USM 是为全副优化过的。
最终，我希望Nikon发布 70-200mm 镜头的新版。那时 D700的价格也就便宜下来了。
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