[good]

唔該

[王迦南]

AF-S DX NIKKOR 16-85mm 原則上是可以用在 D700 的，但DX鏡套在FX機身上，這明顯不是一個好的選擇。

若真要這樣做，焦距 x 1.5 便行。

[YKHUI]

師兄 , 我用緊 D90 , 套支 AF 50mm 鏡 , 焦距變成75mm , 如果 套支 AF-S DX 50mm 鏡 , 仗到底焦距係 50mm 定係 75mm 呢 ? 請指教 !

[peterchan04]

50mm 如果寫住係 dx 鏡..... 如果炸.

用係 dx 機上 都係 50x1.5 = 75mm.

因為現時鏡頭上寫既 "焦距數值".... 全部係以 35mm全片幅計.


.

[風白翎]

技术注解：1）什么是影像圈？

　　影像圈是指镜头可以覆盖的感光元件或胶片面积。目前，许多镜头厂商都有专门为非全幅面感光元件生产的小像场镜头。相比于为全画幅生产的镜头，小像场镜头的优点的质量，体积和价格，但小像场镜头无法应用于应用了全画幅感光元件的单反相机。非全幅画幅在价格和体积上的优势是全画幅无法取代的，所以业余级的单反相机会一直使用非全幅画幅。但是，假如你认为自己将来会升级到体积较巨大的全画幅相机，你就应该关注.....
http://www.xitek.com/info/showarticle.php?id=5745

[kit0901m]

FX 格式: 4,256 x 2,832 [L], 3,184 x 2,120 [M], 2,128 x 1,416 [S]; DX 格式: 2,784 x 1,848 [L], 2,080 x 1,384 [M], 1,392 x 920 [S]

[mhinchu]

D700:
Set FX mode 係16mm~85mm
Set DX mode 就係 x 1.5 =24mm~127mm

但如果D700無set DX mode即使都係16mm但影出嚟有機會太Wide時會有黑圈~Set DX mode 像素又無咗一半~我放過支10mm-24mm入去~好似偷拍鏡咁~

[grasscho]

咪corp完後同DX機一樣 X 1.5, 但得番五佰幾萬像素

[ronnyvaio]

Seems that many people still don't understand the focal length of a lens is an absolute value. It doesn't change when fitted to FX or DX camera.

When a "FX lens" is fitted to a "DX" camera, it just "looks like" the focal length is increased because only the centre part of the image circle is used. This is similar to cropping the centre part of a photo. So sometimes it is called "crop factor". By calculating the ratio of the "full frame" (i.e. 24x36mm) to that of "DX CMOS" will get you the crop facter.

[YKHUI]

唔該師兄 ,

[sukkan1]

D700 is FF digital camera- Use old D len or use newer N len.
If you want to use any AF-S Dx len. You should Buy the D300 and save 50% on camera body.

Ues D700 with any AF-S DX 會有黑圈 O.K.