> what Paul said, there are different "revisions" of > IS (like the 100-400 and > 75-300 which are older vs. the 70-200 and 70-300 > which are newer) which > are sometimes referred to as v1 and v2 and provide > differing numbers of > stops of shutter speed improvement. >
AFAIK, out of the pre-pma '04 EF lenses: -Only 10 have the IS. The 75-300 f4-5.6 has the OLDEST version (introduced in 1995). -Only the 70-200 f2.8L IS (2001) has an IS gain of 3 stops - all other 9 pre-2001 IS lenses have a gain of only 2 stops. (Note: The 400 DO IS which was also released in 2001, was actally unvieled in late 2000, and that is why perhaps the 3 stop gain did not make there - just my guess) -The 2 mode IS has been in all IS lenses since 1997, with the exception of the 28-135 (it has a single mode IS) (hence 8 lenses out of the 10 have 2 mode, while 2 lenses don't) - All IS lenses of vintage 1999 or later have tripod detection without exception. (4 have it, 6 don't) Of course the two new lenses continue the above tradition with both having 3 stop gain as well as tripod detection as well as 2 mode IS (or should it now be known as "three" mode ????) - as per the info on dpreview: http://www.dpreview.com/news/0401/04012902canon70300do.asp http://www.dpreview.com/news/0401/04012901canon28300is.asp Indeed Canon has been generous and has been faithfully including technology across the board on new arrivals, with the exception of the 2 mode not being on 28-135. - Harman __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free web site building tool. Try it! http://webhosting.yahoo.com/ps/sb/ * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
