Jani Patanen said: > That's not the issue. If you think about it bit closer: > Shake = rapid velocity changes. Eliminating shake = > trying to keep velocity constant -> no acceleration.
> What it does have effect on is the point when the "free space" where the > IS group can float runs out and it has to start moving, then there is > strain between the IS group and the lens body. Well, the same restriction applies to sensor movement if that's the way you want to go... You'll end up with a half-globe-formed body with a sensor moving freely on the inner surface. (just putting your practical idea into theory ;-) Put handles on it and you'll win a lot of designer prizes :) But on a serious note: the IS group is not a very big group, moving it does not consume a lot of energy. My guess is that the gyros and electronics behind consume more energy - you'll need the same kit to move the sensor... Additionally, the movement of the IS group in the lens is more or less "natural", think of early german geophysicists using a theodolyte with stabiliser, without batteries or any other source of energy, other than gravity! I think Zeiss has a bit of a say in that ;-) Furthermore, camera movement is harder to detect than lens movement! What I mean is that when you hold the camera, the movements will be around turning points INSIDE the camera (approx. where you hold it). For detection of camera movement, you'll need much better sensors (bigger, more accurate gyros) than in the lens (the movements are bigger due to the lever effect - thus easier to detect). What I think might be a possibility however is a larger digi-sensor and in-camera processing (digital stabiliser)... But where does that leave the boundary between photografy and video? Just some thoughts before Christmas (hope to get something with IS in it myself ;-) Cheers, Stefan * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
