RE: Re: rise or fall

[James Romeo <jromeo@xxxxxxxxxxx>]

This is what a shift does
-----Original Message-----

From: panorama-l@xxxxxxxxxxxxxxxxx
To: panorama-l@xxxxxxxxxxxxxxxxx
Subject: Re: rise or fall
Date: Tue, 22 Feb 2000 18:55:56 +0000

if moving your head up or down a foot or so doesn;t significantly change the 
angle of view how can an inch or two do it  with a lens, an inferior 
subsstitute for the eye? no, what it does is place on the negative  the 
desired part of the larger image available with a lens covering 
significantly more than the format. a shift is a cropping device, no more.no 
less. if you had the whole image circle formed by the lens a shift of a foot 
wouldn' amount to an anthill. 
-- rof 
 
 
---------- 
>From: zxiong@xxxxxxxxxxxxxxxxxxxxxx 
>To: panorama-l@xxxxxxxxxxxxxxxxx 
>Subject: Re: rise or fall 
>Date: Mon, Feb 22, 1999, 11:12 PM 
> 
 
> 
> I think a little optical illustration may help.  I hope this will display 
t> properly in plain text mode. 
> 
> 
>      Scene                 lens         image on film (upside-down) 
> 
>        ___ 
>         | 
>         | 
>    shift-up view                               --- 
>         |                                       | 
>         |                                 shift-down image 
>        ---                                      | 
>         |                                      --- 
>         |                   /\                  | 
>     no shift               |  |            non-shift image 
>         |                  |  |                 | 
>         |                   \/                 --- 
>        ---                                      | 
>         |                                 shift-down image 
>         |                                       | 
>   shift-down view                              --- 
>         | 
>         | 
>        --- 
> 
> 
> In one word, shift changes the angle of view.  It has two functions. 
> 1, raise/lower the horizon on film; and 2, provide a higher/lower angle of 
> view without tilting the camera so that the object (such as building) and the 
> focal plane (film) remain parallel and thus vertical lines stay vertical on 
> film (not converging lines which you'll get pointing your camera up). 
> 
> One good example is that when you shoot with a wide angle lens, you can pull 
> in a toll building by stepping backward a few steps, not by climing a ladder. 
> With a normal lens there may not be enough room for you to move back. 
> Think shift as changing to a wider angle lens and you capture only part of 
> the image of that wider angle. 
> 
>