have you used any Canon IS equipment, particularly their binoculars? you still haven't said anything that says a pendulum isn't an accelerometer. it measures acceleration and does something. the gyros inside Olympus equipment for IS also measure acceleration and does something. all Canon has done is have it do the detection mechanically. however, since having IS enabled uses a lot of power from the camera body, that something is power actuated, even if it is mechanically controlled.
Herb.... ----- Original Message ----- From: "Tom Reese" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, June 17, 2004 7:21 AM Subject: Re: IS in Pentax *istD (was Re: canon vs pentax) > The above is based on the IS explanation in the Canon lens guide. > > An accelerometer based system would measure the camera movement and > calculate the required compensation then servo motors (or some other type of > device) would attempt to make that compensation. IMO that would be a mess. > The Canon system is simple and elegant at the same time. I do wonder what > sacrifices are being made in the design of the optics to make it work. I > don't know if there is a difference in sharpness between IS lenses with IS > turned off and non IS lenses. It would be interesting to find out.
