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  • Purple lines showing up in my pictures.

    I've only noticed it in these two. While I was submitting this photo to planepictures.net, I noticed a sort of purple line right behind the tail. What is this? How can I fix it? I've had one picture rejected by them for having that purple thing there. Does it have something to do with the clouds being in the background?

    And you can notice it even more heavily with this picture. I though it may have had something to do with the blue of the fuselage, but I guess not, since it showed up in the above picture.

    It may be hard to see here, because photobucket sucks and makes my pictures too small..


  • #2
    Im finding it hard to see mate

    Comment


    • #3
      Originally posted by LHR-Domi
      Im finding it hard to see mate
      I'm having that same problem.
      http://www.aircraftinaction.co.uk/

      Comment


      • #4
        It's abit faint but it's mainly around the tail -



        Jordan, just out of curiosity which lens are you using?

        Dale

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        • #5
          I see it on my laptop screen a little. It's purple/red fringing almost like chromatic abberation (if that's what it is).

          Comment


          • #6
            Yeah, Chromatic Abberation or glare (sometimes I get purple hazes from sun reflecting off metals).

            Comment


            • #7
              That's chromatic abberation for sure.

              Read about here:

              http://www.imatest.com/docs/sfr_chromatic.html

              Roel.

              Comment


              • #8
                It's CA, and it's common in poor quality lenses. Get a better lens, and it will disappear.

                Comment


                • #9
                  It was very hard to see unless I look close. Usually the CA comes up around high contrast areas such as lights.

                  Comment


                  • #10
                    I'm using a C-765, so a new lens is out of the question. It's not too much of a problem, as it only shows up in a few pictures. Is there anything I can do in photoshop to get rid of it?

                    Comment


                    • #11
                      I see it barely......as said, most likely CA
                      Canon 20D & BG-E2 Grip
                      EF 50mm 1.4 USM
                      EF-S 18-55mm
                      EF 28-135mm IS USM
                      EF 70-200mm f4L
                      EF 100-400L IS
                      1.4X II Teleconverter
                      Canon 420EX Speedlite
                      Canon 430EX Speedlite
                      Manfrotto Tripod and Monopod

                      David Wilson | Through the Fence Photography



                      Comment


                      • #12
                        From http://www.imatest.com/

                        Purple fringing is not chromatic aberration, though it is often mistaken for it. It is a saturation phenomenon in the sensor, caused by the overflow of electrons from highly saturated pixel sites to nearby unsaturated sites. It tends to be worst in cameras with tiny pixels (e.g., 8 megapixel compact digital cameras). It has everything to do with the sensor and nothing to do with the lens.

                        Greg
                        My contribution to JetPhotos

                        Comment


                        • #13
                          Originally posted by Greg Wilson
                          From http://www.imatest.com/

                          Purple fringing is not chromatic aberration, though it is often mistaken for it. It is a saturation phenomenon in the sensor, caused by the overflow of electrons from highly saturated pixel sites to nearby unsaturated sites. It tends to be worst in cameras with tiny pixels (e.g., 8 megapixel compact digital cameras). It has everything to do with the sensor and nothing to do with the lens.

                          Greg
                          Well, ya learn something new every day don't you? Thanks Greg......
                          Canon 20D & BG-E2 Grip
                          EF 50mm 1.4 USM
                          EF-S 18-55mm
                          EF 28-135mm IS USM
                          EF 70-200mm f4L
                          EF 100-400L IS
                          1.4X II Teleconverter
                          Canon 420EX Speedlite
                          Canon 430EX Speedlite
                          Manfrotto Tripod and Monopod

                          David Wilson | Through the Fence Photography



                          Comment


                          • #14
                            Sorry Greg, you're wrong.

                            There were about 1500 other references available, but I got bored after copying these....


                            "Chromatic aberrations are wavelength-dependent artifacts that occur because the refractive index of every optical glass formulation varies with wavelength. When white light passes through a simple or complex lens system, the component wavelengths are refracted according to their frequency. In most glasses, the refractive index is greater for shorter (blue) wavelengths and changes at a more rapid rate as the wavelength is decreased."

                            "Chromatic aberration or "color fringing" is caused by the camera lens not focusing different wavelengths of light onto the exact same focal plane (the focal length for different wavelengths is different) and/or by the lens magnifying different wavelengths differently. These types of chromatic aberration are referred to as "Longitudinal Chromatic Aberration" and "Lateral Chromatic Aberration" respectively and can occur concurrently. The amount of chromatic aberration depends on the dispersion of the glass."

                            http://physics.about.com/cs/optics/g...aticaberra.htm

                            http://www.yorku.ca/eye/chroaber.htm

                            http://hyperphysics.phy-astr.gsu.edu...opt/aber2.html

                            http://www.vanwalree.com/optics/chromatic.html

                            http://www.maa.mhn.de/Scholar/chromatic_aberration.html

                            http://www.microscopyu.com/tutorials...ons/chromatic/

                            http://www.dpreview.com/learn/?/Glos...rration_01.htm

                            http://en.wikipedia.org/wiki/Chromatic_aberration

                            http://www.canon.com/bctv/faq/chrab.html

                            http://www.imatest.com/docs/sfr_chromatic.html

                            Nice try though.

                            Comment


                            • #15
                              Originally posted by JeffinDEN
                              Sorry Greg, you're wrong.
                              Read the quote again!!!!! It refers to purple fringing not CA.


                              Greg
                              My contribution to JetPhotos

                              Comment

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