[joee1970]

I have a question about the lens focal lenght in SLR and DSLR. As I know that the lens focal length need x 1.5 (or 1.6) in DSLR.
e.g. 18-55 lens in DSLR the same as 27-82 in SLR
BUT is this the view angle (18 in DLSR = 27 wide in SLR) only ?
How about the zoom in effect (magnify ratio) ? also x 1.5 ?
e.g. zoom the lens to 55mm in DSLR, the magnification ratio will the same as 82mm in SLR or same as 55mm in SLR only
(view angle = 82mm, magnification ratio = 55mm in SLR)
OR
(view angle and magnification ratio are both = 82mm in SLR)

[micros]

焦距一樣
變焦倍數一樣
放大率一樣
只係視角唔同

[pongyee]

焦距唔一樣
變焦倍數一樣
放大率唔一樣
視角唔同

我o既睇法

[Double K]

I agreed micors sated.

焦距一樣
變焦倍數一樣
放大率一樣
只係視角唔同

[joee1970]

which one is correct ?? ^ ^

[playd70]

焦距一樣
變焦倍數一樣
放大率一樣

視角唔同
影深唔同

[Ah Chai]

影深唔同 ？
會嗎？
我也有這種「感覺」。
但我以為這跟，數碼有D鬆鬆地，於是影深唔清析有關係。

[lambertnh]

「景深」响同樣焦距會一樣
「景深」响同樣「構圖」會唔一樣

[kingkonghk]

相同距離景深一樣, 構圖會唔同左右
相同構圖景深唔一樣, 距離會唔同左

[beancurdbean]

片幅唔同, 會直接影響circle of confusion, 直接影響影深 (FF=0.03mm APS-C=0.02mm)
片幅唔同而構圖一樣, 會直接影響距離或焦距, 一樣直接影響影深

"數碼有D鬆鬆地"同影深無關係, 影深只係表示有幾深範圍中焦

[joee1970]

So.....if all condition are the same (position, setting, zoom distance,, etc)
Take a photo with 135mm film SLR and DSLR with the same lens and zoom distance, e.g. zoom to 100mm
the photo should be the same (NOT included the photo quality, color issue etc.)
Only the view angle (some part of left and right side are cut off in the photo taken by DSLR,) and the 影深 are different.
IS it correct ???

[beancurdbean]

物理上, 片幅大細(如果同一CCD同一像素)仲會影響 noise同Dynamic range
http://www.dpreview.com/learn/?/Glossary/Digital_Imaging/Noise_01.htm
http://www.dpreview.com/learn/?/Glossary/Digital_Imaging/dynamic_range_01.htm