DV Info Net

DV Info Net (https://www.dvinfo.net/forum/)
-   Still Crazy (https://www.dvinfo.net/forum/still-crazy/)
-   -   Digital SLR focal legenth multiplier effect on image compression (https://www.dvinfo.net/forum/still-crazy/32925-digital-slr-focal-legenth-multiplier-effect-image-compression.html)

John DeLuca October 3rd, 2004 08:23 PM

Digital SLR focal legenth multiplier effect on image compression
 
We all know about the 1.5X focal legenth multiplier factor on most current digital SLR's, where your 50mm effectively becomes a 75mm. Of course what is actually happening is your 50mm lens is still projecting the same image, the smaller chip size in the digital SLR is just cropping the image.

What I am trying to understand is if you get the same amout of image scene compresssion as a lens of the higher focal legenth equivalent. Is my 85mm lens on my Nikon digi SLR's compressing the scene as much as a 127mm focal legenth lens would on a film body, or is it still compressing the scene as much as an 85mm would on a 35mm, and only cropping the image.

John

Jeff Donald October 3rd, 2004 08:36 PM

Perspective only changes when you change the position of the camera in relationship to your subject. Changing the focal length of the lens, either by changing lenses or zooming, does not change perspective.


All times are GMT -6. The time now is 12:20 AM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2021 The Digital Video Information Network