- ----- Original Message ----- From: "Schlake (William Colburn)" <[EMAIL PROTECTED]>
> My longest lens is the 100-400L. If I > take a picture through the lens on my tripod at a slow shutter speed > (with IS off) it always comes out blurry. I tried using a bulb so I > wouldn't touch the camera, but it barely helps. I'm guessing my > mirror slap is making the whole thing move. Either that, or the wind > is doing it. Sounds like your Tripod/Head aren't really doing a good job of holding the camera steady. There is some back-handed good news in that, because it means you should be able to turn your IS back on while this lens is on the Tripod. I know Canon says not to do that, but I have found it does work just fine WHEN your tripod is not actually holding the Camera/Lens perfectly steady. This is particulary true if you are not fully locking down the head so you can follow your subject. You do have to be careful doing this, though, as having the IS on can actually introduce movement if the camera is really rock-solid. When using my smaller travel tripod, I used to use this lens with IS on all the time. I found as my technique improved, and under circumstances that allowed me to really get the tripod locked down, I had to turn it off more often. With shorter exposures, you can actually observe if the IS is helping or hurting right through the viewfinder before you take the shot. For very long exposures there seems to be more risk that IS will kick in at some point and spoil the shot. Paul Wasserman * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
