4 Replies Latest reply: Feb 15, 2008 9:50 AM by John_Cornicello_Photo RSS

    30D Camera Tips?

    Community Member
      Not sure if i'm in the right forum. Whilst i'm not gunna blame equipment. There must be something I'm doing wrong.

      I'm taking shots with a Canon 30d and a USM 2 28-105m 1-3.5-4.5

      Shots seem a little blurred even with a tripod, shutter release and at the smallest apputure I can get.

      I know this all depends on this(bla)or that (bla) factors.

      But this is regular landscapes a little blurred and also close ups (in General)

      Is it me? Or can I only get so far with this lens? Or Both?

      I'm also having a bit of a hard time with the 6 or is it 9 point focus.You know the little red things in the middle of the viewfinder. Should I leave this on all points? Select specific points?

      Also want to get into product photography. Anything to Reccommend?
        • 1. Re: 30D Camera Tips?
          Thomas Knoll Community Member
          "smallest apputure [sp] I can get..."

          Read up on diffraction limits...
          • 2. Re: 30D Camera Tips?
            John_Cornicello_Photo Community Member
            You might want to bring this up over in the Photography forum at http://www.adobeforums.com/webx/.3bb41392/

            But, as Thomas notes, small apertures will degrade your image. It could also be the lens. Do you have access to another similar focal length range lens to test with?
            • 3. Re: 30D Camera Tips?
              Community Member
              Yes John, I have heard of defraction before. I think I may have to look into this a bit more.

              Though just reading quickly, Why don't lens manufacturers stop their lenses. Eg: Why say a car can go 250mph when it wobbles it's *** off, wouldn't you say it's spects are better at say 190 mph?

              http://www.cambridgeincolour.com/tutorials/diffraction-photography.htm
              • 4. Re: 30D Camera Tips?
                John_Cornicello_Photo Community Member
                Sometimes you want the trade-off between greater depth of field and the abberations you get from stopping too far down. Each lens has an optimum aperture, usually around the middle of the scale. Wide open the lens suffers some abberations. Stopped down it suffers from others. At least we have choices instead of just one aperture setting (which is what you get on "mirror" lenses).