索尼半画幅相机标准焦距转换系数为1.5。索尼全画幅相机的感光元件COMS的尺寸是36*24mm,对角线尺寸是43.27mm,而半画幅相机的COMS尺寸约为22.3*14.9mm,对角线的尺寸为26.82mm,所以这两种相机的焦距转换系数为43.27除以26.82,约等于1.6。所以镜头在半画幅相机使用时,等效焦距要乘以1.5。如50定焦镜头,在半画幅相机上就等效于全画幅相机的80mm焦距。
比如50mm
1.4 的镜头,在全画幅上就是这么多,在APSC也就是半幅机上就是50*1.6=80mm, 最大光圈1.4*1.6=2.24。也就是说,apsc上使用50 1.4 的镜头,光圈全开等效于 全画幅机子上使用80mm
2.24的效果。
全画幅相机使用全画幅镜头,镜头是按1:1记录画面,比如讲50mm镜头,实际焦距就是50mm;而半画幅相机其使用的镜头要乘以一个系数,才是该镜头的实际焦距,仍用50mm 镜头为例,半画幅镜头就需要乘以1.6,也就是说实际镜头焦距是80mm。这样半画幅的照相机实际镜头的角度小于镜头标注的数值。
半画幅和全画幅焦距的计算方式是不同的,因为它们的传感器尺寸不同。
对于全画幅相机来说,其传感器大小为24mm x 36mm,因此焦距的计算方式与镜头标称的焦距相同。
对于半画幅相机来说,其传感器大小为约15.6mm x 23.5mm,因此需要将镜头标称焦距乘以一个系数才能得到实际焦距。这个系数通常为1.5或1.6,具体取决于相机制造商和型号。例如,如果一个镜头标称焦距为50mm,当它安装在一个1.5倍系数的半画幅相机上时,实际焦距为50mm x 1.5 = 75mm。
需要注意的是,这种焦距计算方式只适用于以35mm全画幅相机标准为基准的镜头。对于其他标准的镜头(如中画幅镜头),需要采用不同的计算方式。
全幅相机镜头的焦距从8mm鱼眼到800mm超长焦都有。
镜头的焦距都是按全画幅标定的,就是300
焦距取决于镜头,与全幅不全幅的没关系。目前来说,全幅相机镜头的焦距从8mm鱼眼到800mm超长焦都有,甚至有更长的。
全画幅和半画幅镜头的焦距换算关系如下:全幅相机镜头的焦距乘以1.5就是半幅相机镜头的焦距,这就是全副和半副单反镜头“等效焦距”的概率。
索尼半幅相机标准焦距转换系数为1.5。全幅也就是135相机的焦距一般叫标准焦距或者等效焦距,半幅相机感光元件大小约为全幅相机的44%左右,在等效焦距上需要乘以一个系数。焦距转换系数就是全画幅相机感光芯片或胶片对角线的尺寸与数码相机感光芯片对角线尺寸的比值。
全画幅胶片相机胶片的尺寸是36*24mm,其对角线尺寸是43.27mm,而索尼半画幅COMS对角线的尺寸为28.84mm,所以这款相机的焦距转换系数为43.27除以28.84,约等于1.5。所以如果索尼半画幅相机装上50mm的全画幅定焦镜头,就等效于全画幅相机的80mm焦距。故数码相机的感光芯片越小,其镜头焦距转换系数越大。
佳能相机全画幅是aps-c画幅的1.5倍。全画幅镜头可以用在aps-c画幅相机上。aps-c镜头不能用在全画幅相机上。
Commutation coefficient of focal length of standard of half picture camera is Suo Ni 1.5. The dimension of the sensitive component COMS of camera of Suo Ni full frame is 36*24mm, diagonal dimension is 43.27mm, and the COMS dimension of half picture camera is 22.3*14.9mm about, diagonal dimension is 26.82mm, so the focal length commutation coefficient of these two kinds of camera is 43.27 except with 26.82, approximate 1.6. So camera lens is used in half picture camera when, equivalent focal length should be multiplied with 1.5. Be like 50 focus camera lens, equivalent on half picture camera the 80mm focal length at full frame camera.
For instance 50mm
The camera lens of 1.4, so much is on full frame, in APSC 50*1.6=80mm is on half range machine namely, 1.4*1.6=2.24 of the biggest aperture. That is to say, the camera lens of 50 1.4 is used on Apsc, aperture a standard-sized sheet is equivalent at full frame machine child go up use 80mm
The effect of 2.24.
Full frame camera uses full frame camera lens, camera lens is to press 1:1Record picture, tell 50mm camera lens for instance, actual focus is 50mm; And the camera lens that its use half picture watch for an opportunity should be multiplied with a coefficient, just be the actual focus of this camera lens, still be with 50mm camera lens exemple, half picture scene is multiplied with respect to need with 1.6, that is to say actual shot focal length is 80mm. The angle of actual shot is less than the camera of such half picture the numerical value that camera lens tags.
The computational means of half picture and full frame focal length is different, because their sensor measurement is different.
To full frame camera, its sensor size is 24mm X 36mm, the focal distance with the computational means of focal length and accordingly nominal camera lens is same.
To half picture camera, its sensor size is make an appointment with 15.6mm X 23.5mm, need general camera lens is accordingly nominal focal length is multiplied get actual focus with ability of a coefficient. This coefficient is normally 1.5 or 1.6, specific depend on camera manufacturer and model. For example, if a camera lens is nominal,focal length is 50mm, when it installation is on the half picture camera of a 1.5 times coefficient when, actual focus is 50mm X 1.5 = 75mm.
Those who need an attention is, computational means applies to this kind of focal length to be fiducial camera lens with standard of camera of 35mm full frame only. The camera lens to other level (scene of the picture in be like) , need uses different computational kind.
Complete the focal length of a camera camera lens has to Jiao Dou of 800mm train in excess specified length from 8mm pearl eye.
The focal length of camera lens presses full frame demarcate, namely 300
Focal length depends on camera lens, with complete not complete irrespective. Eye comes round to say, complete the focal length of a camera camera lens has to Jiao Dou of 800mm train in excess specified length from 8mm pearl eye, have even longer.
Full frame and the concern of focal length conversion of half picture scene are as follows: Complete the focal length of a camera camera lens is multiplied with the 1.5 focal length that are camera lens of half range camera, this is complete and half pairs of sheet turn over camera lens " equivalent focal length " probability.
Commutation coefficient of focal length of standard of camera of Suo Ni half range is 1.5. Complete namely the focal length of 135 camera calls standard focal length equivalent perhaps focal length commonly, size of component of sensitization of half range camera is about complete of a camera 44% the left and right sides, on equivalent focal length need is multiplied with a coefficient. The ratio of dimension of diagonal of the dimension that focal length commutation coefficient is chip of sensitization of full frame camera or film diagonal and chip of digital camera sensitization.
The dimension of film of camera of full frame film is 36*24mm, its diagonal dimension is 43.27mm, and the dimension of diagonal of half picture COMS is Suo Ni 28.84mm, so the focal length commutation coefficient of this camera is 43.27 except with 28.84, approximate 1.5. If all alone,so the full frame of 50mm of mount of half picture camera focuses the Buddhist nun camera lens, equivalent the 80mm focal length at full frame camera. The sensitive chip of reason number camera is smaller, commutation coefficient of focal length of its camera lens is bigger.
Beautiful can 1.5 times camera full frame is Aps-c picture. Full frame camera lens can be used on Aps-c picture camera. Aps-c camera lens cannot be used on full frame camera.