> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Henry Posner > At 07:31 PM 8/10/2004 +0200, EOS-Digest wrote: > >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. > > There MUST be other possibilities. I've used lenses that long with no > mirror lock-up on tripods and gotten razor-sharp images. Are you attaching > the lens+body to the tripod via the lens' tripod collar or the camera > tripod thread? Are you extending the tripod's center column - this is > ALWAYS a compromise as use of the center column really compromises most > tripods. Are you sure the blur you're seeing is motion and not a focus > issue? Are you evaluating the original film - negs/slides or prints?
Good points. There are additional sources that can cause blur. If there are people walking around the floor might move. This can be especially felt on wooden floors and/or elevated floors. There are tons of other similar sources like when the tripod is setup in (flowing) water, etc. Strong wind with a flimsy tripod can be another source. You can try to hang your camera bag or something else from your middle column for additional stability. If you don't do it right it can make it worse, though. Of course also your object might move ever so slightly. Look at a reference object that you know didn't move, i.e. a mountain etc. Robert * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
