尼康D3100vs D7000 | Nikon D7000 vs Nikon D3100 Features, Performance Compared
Nikon is a giant name in the camera industry. It has some excellent DSLR and compact cameras lined up. The Nikon D3100 is an entry level DSLR, while D7000 is a semi-professional DSLR camera. This article will try to compare the features of discuss the difference between the Nikon D3100 and D7000.
Tips to select a Digital Camera
Resolution of the Camera
Resolution of the camera is one of the main features a user must look into when buying a camera. This is also known as the megapixel value. The Nikon D7000 features a 16.2 megapixel sensor with 14 bit A/D conversion, and the Nikon D3100 features a 14.2 megapixel sensor with 12 bit A/D conversion. This means the D7000 is faster and has more resolution than the D3100.
ISO Performance
ISO value range is also an important feature. The ISO value of the sensor means, how much sensitive the sensor is to a given quantum of light. This feature is very important in night shots and sports and action photography. But increasing the ISO value causes a noise in the photograph. The D3100 has an ISO range of 100 to 6400 “standard” ISO, and can be expanded up to 12800 ISO. Meanwhile, the D7000 has an ISO range of 100 to 6400 ISO, but can be expanded up to 25600 ISO.
每秒帧
帧每秒的速度或更通常被称为the FPS rate is also an important aspect when it comes to sports, wildlife and action photography. FPS rate means the mean number of photos the camera can shoot per second on a certain setting. This is where the massive difference comes. The D3100 has an almost acceptable frame rate of 3 frames per second. But D7000 has 6 frames per second rate, which is really impressive for its class.
快门滞后和恢复时间
A DSLR would not take the picture as soon as the shutter release is pressed. In most conditions the auto focusing and auto white balancing would take place after the button is pressed. Therefore, there is a time gap between the press and the actual photo taken. This is known as the shutter lag of the camera. Both of these cameras have very little shutter lag.
自动对焦点的数量
Autofocus points or AF points are the points, which are built into the memory of the camera. If priority is given to an AF point, camera will use its autofocus ability to focus the lens to the object in the given AF point. The D3100 has a 11 point autofocus system, which is typical in entry level cameras. But D7000 has a 39 point autofocus system with 9 cross type sets.
High Definition Movie Recording
高清电影或高清电影对应于比标准定义电影高的电影。高清电影模式为720p和1080p。720p的尺寸为1280×720像素，而1080p的尺寸为1920×1080像素。这两个相机都支持1080p 24帧每秒录制。
Weight and Dimensions
The D3100, which is relatively smaller and lighter than the D7000, measures 124 x 96 x 75 mm in dimensions and weighs 505 grams including battery. But the D7000 weighs 780 grams and measures 132 x 105 x 77 mm in dimensions.
Storage Medium and Capacity
在数码单反相机中，内置的内存几乎可以忽略不计。需要外部存储设备来保存图像。这两个相机都支持SD，SDHC和SDXC存储卡。
展示的实时视图和灵活性
Live view is the ability to use the LCD as a viewfinder. This can be convenient because the LCD gives a clear preview of the picture in good colors. Both of these cameras have live view with 3 inch LCDs.
Conclusion
D7000是半专业的DSLR，而D3100是入门级DSLR。D7000中的功能必定会超越D3100中的功能。但是，如果您是一个业余爱好者，想踏入DSLR World D3100是一个不错的选择。
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