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.


I meant to also say that even though your statement is true when only 
the sensor is moved, its not true when both the sensor and the lens are 
moved in parallel, i.e. we are following the axis of motion in parallel. 
 I.e. the antishake thing can work without focal length info if the 
only types of motions were translations.

S


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Someone handed me a picture and said, "This is a picture of me when I 
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