单反，变焦倍数？ 光学变焦相机和单反区别？英文双语对照

一、单反，变焦倍数？

单反相机的变焦倍数是要看镜头的，是由镜头的变焦距离来决定，如果你的镜头距离是24到105，那可以说变焦距离相当于五倍的变焦。

他不像数码相机有固定的镜头距离，数码相机一般的镜头焦距为28毫米，它可以通过内部来变焦大部分距离到75之间，但是如果是单反的话，你选择超长焦的镜，比如100到300毫米的镜头，那么变焦大约为25倍变焦。

二、光学变焦相机和单反区别？

光学变焦就是改变镜头的焦距获得不同的视角，优点是使用方便，缺点是光圈略小成像不如定焦。

定焦就是不能改变焦距的镜头优点是光圈可以做的很大成像好，缺点是使用不方便。

单反是相机的一种结构形式，优点配件丰富，可以根据不同的要求选用不同的镜头等配件，感光元件大，画质好，功能多······缺点是体积大、重，贵。

三、挑选数码相机，如何选择数字变焦和光学变焦？

光学变焦 依靠光学镜头结构来实现变焦，变焦方式与传统相机设计一样，取决于镜头的焦距，是通过摄像头的镜片移动来放大与缩小需要拍摄的景物。光学变焦倍数越大，能拍摄的景物就越远。光学变焦可以支持图像主体成像后，分辨率及画质不会改变，相对清晰。数码变焦 实际上是画面的电子放大，把原来CCD影像感应器上的一部份像素使用“插值”算法将画面放大。通过数码变焦，拍摄的景物放大了，但它的清晰度会有一定程度的下降，类似与VCD或DVD中的zoom功能，只能将原先的图像尺寸裁小，让图像在LCD屏幕上变得较大，但并不会使细节更清晰，相机的最大变焦不是数字变焦和光学变焦的乘积，是相加。W290是款普通的家用机。质量不错，只要伸缩镜头不出问题可以用很久。

四、单反怎么自动变焦？

自动对焦与自动变焦不是一个概念,不知道你问的是不是自动对焦单反相机上的变焦绝大多数情况下只能通过手调镜头的方式来实现,这是由镜头的结构决定的,但是在若干年前,主要是宾得,当然还有佳能和美能达,曾经推出了自动电动变焦的镜头,镜头有变焦的按纽,可以不用手动而实现变焦,并且可以在拍照曝光的过程中取得那种像爆炸的效果,但是这种镜头结构复杂,而且非常耗电,所以后来几乎就没有发展了,只是小型傻瓜相机上才会有运用.因此,现在的单反相机的镜头都是手动变焦的,我们再也看不到自动变焦的镜头了

五、数码相机和单反的区别？

单反相机和数码相机的区别在于：

一、定义不同。单反相机是从照相机取景器结构定义的，是指单镜头反光式取景照相机；而数码相机是从照相机记录影像载体与方式来定义的，是指采用数码技术，以光电传感器和存储器代替胶片记录影像的照相机。

二、以上两种定义方式可以用在同一个照相机上，即单反数码照相机。

六、单反数码相机和消费数码相机的差别？

单反相机和数码相机的区别如下：第一个区别：取景方式的不同。单反是以光学的取景方式，涉及的元器件有反光板和五棱镜。微单它是采用的是电子取景方式——直接用镜头捕捉影像，然后把它转化为电子图象。第二个区别：对焦速度不同。单反的对焦速度会快一点，而数码类的微单，会比较慢一点。第三个区别：宽容度不同。最终的细节，比如说太亮或者太暗的bufen ，数码相机细节丢失很严重。第四个差别：重量不同。数码相机较轻，而单反相机非常重。出去玩如果要背台单反，滋味可不好玩。第五个差别：价格不同。一般来讲，单反都是要比微单价格要贵很多。对数码相机而言，感光元件的尺寸是影响成像质量最直接也是最关键的因素，感光元件越大，则成像质量越高。数码单反相机感光元件尺寸远远超过了普通的消费型数码相机，达到了十几甚至数十倍之多，这就意味着同样为1000万像素的数码单反相机和消费型数码相机，前者在表现打个像素时，拥有更大的感光元件面积进行表现，这也就不难理解数码单反相机拥有更优异的成像质量了。

七、ccd数码相机和单反的区别？

CCD是Charge-coupled Device，中文全称：电荷耦合元件的缩写。曾经应用到数码照相机上作为记录图像的光电元件，但现在基本都被cmos所取代，但是在摄像头上还有采用。

还有可能是部分行业用CCD代称以CCD为传感器的某些特殊设备，实际上也是照相机。

而单反相机是专业记录瞬间高清图像的专业摄影相机功能比较多运用比较广泛

八、数码相机没有光学变焦和自动对焦？

这个问题本身就有点问题。

其实任何照相机本身没有光学变焦能力，光学变焦的实现是取决于他所配的镜头。

卡片机说它有光学变焦是因为镜头不可拆下（硬要拆就坏了），是连为一体的，所以说某某相机有多少倍光学变焦。单反机一般镜头是可拆换的，甚至机身和镜头是分开买的，所以单反机（指机身）是没有光学变焦的。

九、单反怎么拍希区柯克变焦？

拍摄希区柯克效果主要通过变焦来实现。使用单反拍摄希区柯克，需要使用变焦镜头。以下是步骤：

选择变焦镜头。希区柯克风格的特点就是变焦镜头的运用。选择一个带有可变焦距的镜头，尽可能使用广角和长焦，并通过变焦来调整画面。

 增加拍摄手段和构图。希区柯克的电影都有很明显的拍摄手法和构图，可以借鉴其中一些元素，如大胆运用对称构图、透视构图等。

 使用特殊附属配件。希区柯克常常使用镜头遮盖片来制造画面特殊效果，还有使用彩色滤镜来增强画面效果，需要根据拍摄需要选择适当的附件。

稳定性。不同于拍摄普通的影片，希区柯克对拍摄器材的要求比较高，需要确保摄影机的稳定性，避免抖动影响画面效果。

需要做好后期处理。希区柯克电影的后期处理很有特色，需要将拍摄的影片进行特别的处理以达到希区柯克的风格效果。

十、光学变焦最高的单反？

目前是尼康的P900和P900S，具有83倍光学变焦。

变焦比不是越大越好，根据光学素质和光学的特性，固定焦距的镜头素质最高，变焦镜头的出现是在一定程度上为了使用方便，根据光学素质，最佳变焦比不超过1:3，也就是不超过3倍，

One, sheet is turned over, is scorch diploid?

The scorch multiple that sheet turns over camera should watch scene, it is by the scorch of camera lens the distance is decided, if your camera lens distance is 24 to 105, that can say scorch distance is equivalent to fivefold scorch.

Camera of his unlike number has fixed camera lens space, the camera lens focal length with digital average camera is 28 millimeter, it can come through interior scorch is apart from for the most part 75 between, but if be the sentence that sheet opposes, you choose the lens with anxious train in excess specified length, for instance the 100 camera lens to 300 millimeter, so scorch is 25 times scorch about.

2, do optical scorch camera and sheet turn over distinction?

Optical scorch changes the focal length of camera lens to obtain different perspective namely, the advantage is to use convenient, defect is aperture summary Xiaocheng resembles be inferior to focussing.

Focussing the camera lens advantage that is unalterable focal length is aperture what can do is very big into had resembled, defect is use inconvenience.

Sheet is a kind of configuration of camera instead, advantage fittings is rich, can choose fittings of different lens first class according to diverse demand, sensitive element is large, the picture has pledged, defect of · of · of · of · of · of functional much · is bulk big, heavy, expensive.

3, choose digital camera, how to choose digital scorch and optical scorch?

Optical scorch relies on structure of optical camera lens to realize scorch, scorch means and traditional camera design are same, depend on the focal length of camera lens, be through photographing the lens that resembles a head shift comes enlarge and the scenery that narrow need films. Optical scorch multiple is bigger, the scenery that can film is further. Optical scorch can support image principal part to become after resembling, resolution and picture won't be changed character, relatively clear. Digital scorch is the electronic enlarge of the picture actually, use original CCD on video inductor like element partially " interpolation " enlarge of algorithm general picture. Pass digital scorch, filmed scenery magnified, but the fall that its definition can have fixed rate, similar with the Zoom function in VCD or DVD, can reduce original image size only small, let image become bigger on LCD screen, but can not make details clearer, the biggest scorch of camera is not the product of digital scorch and optical scorch, it is addition. W290 is an average family expenses machine. Quality is good, want adjustable camera lens not to give a problem to be able to be used only very long.

4, how automatic scorch does sheet turn over?

Be opposite automatically anxious with automatic scorch not be a concept, what do not know you ask is the kind that hand attune scene can carry only below the case of scorch great majority that returns camera automatically to go up to Jiao Chan will come true, this is decided by the structure of camera lens, but be in a certain number of before New Year, basically be guest is gotten, of course still beautiful can be mixed the United States can be amounted to, once rolled out the camera lens of automatic and dynamoelectric scorch, camera lens has scorch press button, need not be moved with the hand and realize scorch, and can be in take a picture the result that the sort of resembling that explode obtain in the process of exposure, but structure of this kind of camera lens is complex, and report of extraordinary waste time, did not develop almost later so, just just can have on small-sized and goofy camera apply. Accordingly, the hand uses scorch the camera lens that present sheet turns over camera, we also watch the scene that is less than automatic scorch again

5, the distinction that digital camera and sheet turn over?

Sheet turns over the distinction of camera and digital camera to depend on:

One, the definition is different. Sheet turns over camera is defined from camera viewfinder structure, it is to show single shot glances camera of type find a view; And digital camera is from camera record video carrier and means are defined, it is to point to use digital technology, replace film to record video camera with photoelectricity sensor and memory.

2, means of two kinds of definitions can use above in same on camera, namely sheet turns over digital camera.

6, the difference that sheet turns over digital camera and consumptive number camera?

Sheet turns over the distinction of camera and digital camera to be as follows: The first distinguishs: Of means of find a view different. Sheet is the means of find a view with optics instead, yuan of involved parts of an apparatus have glance board with 5 prism. Small sheet it is those who use is means of electronic find a view -- catch with camera lens directly video, next image of electron of its translate into. The 2nd distinguishs: Different to anxious speed. What sheet turns over will be a bit faster to anxious speed, and number kind small sheet, the meeting is a bit slower. The 3rd distinguishs: Latitude is different. Final details, for example too bright too dark perhaps Bufen, digital camera detail is missing very serious. The 4th difference: Weight is different. Digital camera is smaller, and sheet turns over camera very heavy. Go out to if want to carry stage sheet on the back to turn over,play, flavor but not amused. The 5th difference: The price is different. Will tell commonly, sheet is to want than tiny monovalent square instead a lot of more expensive. logarithm code camera, the dimension of sensitive component is to be affected resembling quality also is the most crucial factor directly most, sensitive element is larger, become taller like quality. Digital sheet turned over dimension of camera sensitization component to exceed watch for an opportunity of average consumption number far, achieved ten even tens of of times, this is meant turn over camera of camera and consumption number for the 10 million number sheet that resembles element likewise, former hit in expression when resembling element, have larger sensitive component area to have show, sheet of this not fathomless also number turns over camera to have more exceedingly good into resemble quality.

7, the distinction that Ccd number camera and sheet turn over?

CCD is Charge-coupled Device, chinese full name: The abbreviate of charge coupling component. Once applied to digital camera to regard the photoelectricity that records image as component, but be replaced basically now by Cmos place, but in photograph go up to still have like the head use.

Still be the certain and special device that partial industry uses CCD generation to say to be sensor with CCD likely, also be camera actually.

And sheet turns over camera is professional record instant the function of professional photography camera of high-definition image is applied more quite more extensive

8, is digital camera mixed without optical scorch be opposite automatically anxious?

This problem itself has bit of problem.

Actually any camera itself do not have optical scorch ability, the implementation of optical scorch is to depend on the scene that he mixes.

Because camera lens is not detachable,card machine says it has optical scorch is below (extortionary tear open bad) , it is an organic whole repeatedly, say such-and-such camera has how many times optical scorch so. Sheet is turned over aircraft is general camera lens is detachable change, even airframe and camera lens are bought apart, so sheet is turned over machine (point to airframe) do not have optical scorch.

9, how does sheet pat rare Ou Ke to overcome scorch instead?

Film rare Ou Ke overcomes the effect to basically come true through scorch. Use sheet films rare Ou Ke is overcome instead, need uses scorch camera lens. It is measure below:

Choose scorch camera lens. Rare Ou Ke overcomes the characteristic of the style is scorch camera lens to apply. The choice contains a zoom lens, use as far as possible extensive role and long anxious, adjust a picture through scorch.

 Increase film method and composition of a picture. The film that rare Ou Ke captures has film apparently gimmick and composition of a picture, can draw lessons from element of wh some of which, be like bold apply symmetrical composition of a picture, clairvoyant composition of a picture to wait.

 Use special and accessary a replacement. Rare area gram stalking or branch often uses cover of camera lens block to make an appearance special effect, still lens of use color filter enhances picture result, need basis films need chooses proper accessory.

Stability. Unlike film average movie, rare area gram stalking or branch is tall to filming the requirement of equipment is compared, need ensures the stability of cinematograph, avoid to shake influence picture effect.

Need does processing of good later period. Rare Ou Ke overcomes the later period processing of the film to have distinguishing feature very much, the style effect that need has filmed movie special processing be overcome in order to achieve rare Ou Ke.

10, is the sheet with optical highest scorch turned over?

It is Ni Kang's P900 and P900S at present, have 83 times optical scorch.

Scorch comparing is not bigger better, according to optical quality and optical character, the camera lens quality of fixed focal length is top, the occurrence of scorch camera lens is go to the lavatory to use on certain level, according to optical quality, optimal scorch is compared do not exceed 1:3, do not exceed 3 namely times,