>Subject: EOS 3rd & 4th Generation IS > >Hello All, > >When Canon introduced the 70-200/2.8L IS they claimed that the IS for >this lens reduces jitter by an equivalent of 3 stops. Before, Canon >always claimed 2 stops improvement. At that time two possibilities for >that change were suggested. Either, Canon was too conservative before >and with Nikon's VR they just got more aggressive and claimed 3 stops >instead of the 2 stops before. Or, Canon has introduced a better >improved IS. Therefore, I wonder if anybody has done some test that can >shed more light on this issue. > >Robert
I have owned and used quite a few IS lenses... 300/4L IS, 28-135IS, 100-400IS, 70-200/2.8IS and 300/2.8IS. Let me just say right off that the IS on all these lenses works magnificently. Quite honestly I do not detect any difference in effectiveness between the 28-135 and 70-200 even though the later is supposed to have X-generation IS. Even with the 300/2.8L IS which is supposed to automatically detect a stable platform I still find it best to turn it off when really on a rock solid tripod. In my opinion IS is one of the greatest recent developments in lens design. It has allowed me to take sharp hand-held shots that would have otherwise been impossible. - John * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
