> > > Chip Louie wrote: > Hi Peter, > > Guess what, you're incorrect. Some of use DO use IS lenses and with that > experience and knowledge would rather have a 1-2 stop faster lens than a > slower IS lens. IS technology is impressive on the new super teles (I > rented an EF300 2.8L IS), and 70-200 2.8L IS zoom when used within its' > limits. But IS just can't give me back the two stops of shutter speed I > need to freeze subject motion that a faster lens can and IS seems to slow > down AF capture speed and tracking. So for ME, more often than > not IS stays > switched off. > > > ------------------------------------------------------------------ > > Yes Chip, > > Sometimes though after 1/2000 seconds it is pointless using higher speeds > unless you need the wider aperture. > I think your view of IS is very myopic. IS can save you when you at times > when you need something called depth-of-field and slower shutter speeds > (brides in churches) when you cannot run back to your car for a tripod. > Newer IS telephoto lenses also have a special setting for panning. I use > this with focus tracking and results are excellent. > Let me also give you an example of where you benefit from an IS > lens. I was > on a small plane tracking another propeller-driven plane (B24 & > B17) and the > IS lens allowed me to stabilize the image and use 1/250 secs to blur the > propeller. A colleague had a non-IS and had to use 1/500 seconds > and higher > to avoid blur which of course froze the propeller in the image. A funny > looking shot that way. IS is the true differentiator between EOS > and others > SLRs. > > Peter K >
Hi Peter, Well yea, 1/2000 is pretty fast but I'm talking about shooting ISO 100 film in the fading light at 600mm and still getting a sharp image of a car traveling at 180mph. My use of long lenses are more along these lines. As to the issue of IS and DOF there is no doubt that you can add DOF to an image in low light and still get an excellent image with IS. That is as long as you work within the limitations of your subject's motion which IS cannot fix no matter how well IS works. Nice, sharp images of church interiors with motion blurred brides, grooms and guests must be BIG sellers these days. Yes, IS may be able to save you if you didn't think to bring a monopod, but who's fault is that anyway? All Canon primes with IS have had mode 2 operation since being introduced, no news there. I have often used mode 2 for panned shots and it works well for me in this mode if there is enough light to allow the AF to capture and track well. Under these condition IS can help the photographer capture an image with an impressively sharp moving subject and a background showing and/or suggesting movement. I've had the opportunity to shoot out of helicopters with the doors off. If any thing is going to cause blur it's a chopper ride. I had no problems without IS in the lenses I used (EF 20-35 3.5-4.5USM, EF 70-200 2.8L, EF 300 2.8L), and the chromes all came out great. I was on Maui once shooting waterfalls and canyons that are only accessible by chopper or horseback, I was also over the south end of the island and shot some great white sharks swimming along just outside the surf line. Talk about scary, I didn't let the kids go out in surf for the rest of the week! I've also shot out of light aircraft windows and doors without IS and had no problems with airframe induced sharpness problems. Mostly problems caused by the wind blowing me and the lenses around, IS wouldn't fix that problem. I thought that what makes the "pro" EOS bodies and lenses standout from other camera makers' similar offerings is the way Canon's camera body technology is so transparent in use, form and system flexibility and the incredible reliability of the pro series equipment. To me IS is just a part of these system features and company design philosophy that is so attractive to me. IS or IS like technology is slowly (the NIKON way!), going to be available more widely in Nikon lenses. It will take some time but they will slowly increase the number of lenses they offer with IS, will you be chasing after these too? Myself, I'm more a broad look kid of guy and would never select anyone or anything based on only one issue like IS or say abortion. Regards, Chip Louie * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
