Re: A10: Pentax Image Stabilization is here

[Gonz]

Steve Jolly wrote:
Gonz wrote:

Sorry Steve, I dont believe this is correct.  Magnification should 
have nothing to do with it.  Its simple geometry.  Imagine a line 
right down the center of the focal area, now move that line in a 
parallel way some distance, i.e. 1mm.  The entire line, being 
parallel, by definition is 1mm apart from infinity to infinity.


Assuming the line corresponds to a beam of light, you *can't* move it in 
a parallel way.  If it's straight on-axis (which the light will be, if 
the lens is symmetrical about its axis) it'll be bent off-axis.  That's 
what lenses do - they bend light.


Another way to think of it Steve, is this: (again I'm talking about 
moving the whole lens/sensor combo)  imaging an infinitely long parallel 
assembly holding a camera perpendicular to an infinite wall with a 
varying image, as you move the camera/lens along the assembly, if 
magnification was a factor, eventually you would be looking at things 
that were way beyond the fov of the lens, i.e. if for every 1mm you 
moved the camera lens, the image moved 10mm, a magnification of 10, then 
after 100meters, your lens would be looking at something 1km off the axis.

S


--
Someone handed me a picture and said, "This is a picture of me when I 
was younger." Every picture of you is when you were younger. "...Here's 
a picture of me when I'm older." Where'd you get that camera man?
- Mitch Hedberg