> fra: Bob Shell <[EMAIL PROTECTED]> > dato: 2006/01/04 on PM 02:09:14 CET > til: [email protected] > emne: Re: A10: Pentax Image Stabilization is here > > On Jan 3, 2006, at 10:13 PM, Rob Studdert wrote: > > The Minolta system, which appears similar to this new Pentax system, > does not need to know lens focal length. I tested the Maxxum 7D with > a number of lenses mounted via adapters and it worked just fine, even > with a 1000mm mirror lens. I found no difference in effectiveness > between adapted lenses and Minolta lenses.
>From what I've learnt from D/D users the KM cameras recognize each lens in >their system, just like Pentax does with AF lenses. > Maybe I am missing something, but I would assume that a 1mm > displacement of the camera body would produce a 1mm shift in position > of the image on the sensor, regardless of lens focal length. You've got two modes of vibration here. The least important is the pure translation of the camera and lens relative to the optical axis, because the movement would change the picure much. The problem would be the rotational movement which would relate to the centre of gravity of the camera and lens (and probably to how the user holds it). So I think you really need to recognize the lens, because the FL isn't enough. DagT
