alec_myers Posted March 10, 2007 Share Posted March 10, 2007 Does anyone know in a little detail how this differs from mode 1 (the normal mode)? If I had to guess I'd say (hope) that it attempted to compensate for motion*apart* from a first order linear movement (smooth pan) in any direction. Doesanyone know if that's correct? Link to comment Share on other sites More sharing options...
sgpix Posted March 10, 2007 Share Posted March 10, 2007 That's certainly my understanding (and how it seems to work when I've used it - which sin't that often)... Link to comment Share on other sites More sharing options...
jcolwell Posted March 10, 2007 Share Posted March 10, 2007 Yes. Mode 2 is for panning. The lens detects the direction you're panning (horizontal or vertical) and stabilizes the orthogonal axis. The <a href="http://www.photozone.de/8Reviews/canonFAQ.htm">PhotoZone Canon FAQ</a> is a good place to find out more about IS. Link to comment Share on other sites More sharing options...
lester_wareham Posted March 10, 2007 Share Posted March 10, 2007 I agree with the above. Additionally I ddi a series of tests that showed Mode 2 was more effective than Mode 1 when the lens is used on a monopod, even for a stationary subject. This was on a 300 f4L IS so may or may not apply to later versions of IS. Link to comment Share on other sites More sharing options...
alec_myers Posted March 12, 2007 Author Share Posted March 12, 2007 James (et al): Does it have to be either horizontal, or vertical, exactly? or will it cope with (permit) any linear (possibly diagonal) direction? To be honest I could try to test it, but I'm not quite sure how I'd be able to tell, exactly. Link to comment Share on other sites More sharing options...
lester_wareham Posted March 12, 2007 Share Posted March 12, 2007 I guess the way the Mode 2 works is: a) it detects which direction has the largest movement and disables IS on that axis, in which case a diagonal direction will tend for one axis to dominate and have IS truned off whilst the other runs which could be problementic. b) detects a constant movement on (possibly) both axis and disables one (or possibly both) axis. I guess an easy way to test would be to pan the lens and see if the viewfinder shows indications of the IS "hitting the end stops". Link to comment Share on other sites More sharing options...
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