> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Tom Reese > Sent: Sunday, December 04, 2005 10:50 AM > To: [email protected] > Subject: [inbox] Re: EOS EF compared to EF USM and IS compared to non IS > > > thank you everyone for the replies. > > > USM comes in multiple flavors - hence it behooves to > > do one's research well. > > This is obviously a lot more complicated than I thought. To be > more specific with my question: > > I'm trying to figure out the differences between: > > the older non IS 600/4 series II lens (it does say ultrasonic on > the lens barrel but it is not designated USM) > > the newer IS USM 600/4. > > are there focusing differences between the two lenses? > > Is the IS version demonstrably sharper off a tripod? > > thanks >
Hi Tom, I used to shoot motorsports and have used all three of the EF 600 4L lenses. The EF 600 4L IS effectively is the sharpest of the three when hand held. >From a monopod or tripod the EF 600 4L IS and EF 600 4L series II lenses are very much the same which leaves the series I lens EF 600 4L behind in terms of sharpness and contrast. This is NOT to say that the EF 600 4L series I lens is a bad lens as the differences are small and there is more to be gained from technique than the absolute difference in sharpness. Being digital I can fix the contrast of the series I lenses so IMO it's a wash in that respect. The later series II lenses as I recall are also a couple of pounds lighter (and more fragile), compared to the series I EF 600 4L but I almost always used them from a monopod for sports anyway. HTH Cheers/Chip * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
