Pål Jensen wrote:
"Sorry Steve, I dont believe this is correct. Magnification should have
nothing to do with it. "
REPLY:
Magnification has everything to do with it. All IS patents I've read so
far include focal lenght data in order to function.
Magnification matters for the same reason you need a very sturdy tripod
o a super telephoto lens or a macro lens used in close up. If you move
the camera even slightly with, say, a 1000mm lens the angular distance
on film is huge wereas it is almost negligible with a super wide angle.
Thats why you can handhold a 15mm at 1/15s but not a 1000mm lens. In
fact you may not even find the subject in the finder anymore with the
1000mm lens.
An IS system that works without focal lenght (and distance information)
will be far from optimal at best.
Yes, you are correct, as far as most shake corrections are concerned,
because they involve rotations, translations, and angular shifts. The
quote in question was referring to strictly parallel translations, which
do not need focal length to compensate.
--
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
