Frits wrote: > How does IS work? I have seen it done with video camera's where > it is done electronically, but how do you do it with a photo > camera? It is done by adjusting a lens element with fast microdrives (tilting I think), which compensates for the change of the optical axis. This technique is also used in binoculars (e.g. Canon). It is even possible to move the lens element with a clever mechanics alone, but the precision effort is so high that this is not realized in photo lenses. A pure mechanical image stabilized Zeiss binocular exists (very expensive). This reminds me that Pentax holds an old Patent about an autofocus shift lens. This lens uses an internal shift, means only one lens element is moved to create a shift effect for architecture work. Like many other Patents, this product never was marketed. Ralf - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
