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Photo Forum / Digital Photography / DSLR Cameras / March 2006Flare problem
Is this flare? http://peter.greatnowhere.com/g2/main.php?g2_itemId=1036&g2_navId=xd4c2221e I think it is. Canon 28-135 IS USM lens, 20D body. Does this lens have a known flare problem, or I have a dud? Any suggestions on how to clean up the flare thingy in Shop? TIA, Peter >Is this flare? > >http://peter.greatnowhere.com/g2/main.php?g2_itemId=1036&g2_navId=xd4c2221e Looks like it. >I think it is. Canon 28-135 IS USM lens, 20D body. Does this lens have a >known flare problem, or I have a dud? You're pointing the camera at the sun. Pretty much every lens has problems in that situation. However, I notice that the flare is the same color of the sun. To me that indicates that it comes from uncoated optics. And THAT indicates that you're getting a reflection from the uncoated UV reflector you have on the lens. Light can travel through the lens, be reflected from the sensor in the camera, travel back through the lens, get reflected off of the filter, and then trvel back into the lens and appear as a ghost image. >Any suggestions on how to clean up the flare thingy in Shop? Since there isn't a lot of meaningful detail in the flare you could just clone generic tree branch silhouettes.  SignatureRay Fischer rfischer@sonic.net >>Is this flare? >> >>http://peter.greatnowhere.com/g2/main.php?g2_itemId=1036&g2_navId=xd4c2221e > > Looks like it. If you mean the secondary image of the sun, no that is not flare. It is a reflection. >>I think it is. Canon 28-135 IS USM lens, 20D body. Does this lens have a >>known flare problem, or I have a dud? [quoted text clipped - 10 lines] > camera, travel back through the lens, get reflected off of the filter, > and then trvel back into the lens and appear as a ghost image. I think that is Pretty unlikely, especially in the corner because the reflection off the sensor would be reflected out of the field of view. The most probable cause is a reflection between the UV filter and the front element of the lens. Many modern lenses have a pretty flat front element. A poorly coated filter gets a reflection off the front element and reflects the image back to the lens. You can demonstrate the filter is the problem by removing the filter and seeing the problem go away. Use only multicoated UV filters, like Hoya supercoated filters. Roger > The most probable cause is a reflection between the UV filter and the > front element of the lens. Many modern lenses have a pretty flat [quoted text clipped - 4 lines] > > Use only multicoated UV filters, like Hoya supercoated filters. Thanks for all the help, guys! Will take note! ;) Peter > Is this flare? Yes, there is some flare. > I think it is. Canon 28-135 IS USM lens, 20D body. Does this lens have a > known flare problem, or I have a dud? It looks like you may have a UV filter on the lens that is causing the flare. When you're shooting in a situation where flare is likely -- like, for example, into the sun -- you should remove the filter. SignatureJeremy | jeremy@exit109.com >> Is this flare? >> [quoted text clipped - 7 lines] >> TIA, >> Peter I think you might find that particular lens was withdrawn from sale shortly after it hit the market due to a flare issue. They are made in China and the elements or how the glass was made had something to do with it. Depends on the serial number if yours was affected. Call Canon and check with them. Signaturewww.photosbydouglas.com www.weprint2canvas.com If you really must write,use my name at an above domain. > >> Is this flare? > >> [quoted text clipped - 7 lines] > elements or how the glass was made had something to do with it. Depends on > the serial number if yours was affected. Call Canon and check with them. No...you are thinking of the 24-105mm L f/4 IS lens. The OP has the 28- 135mm f/3.5-5.6 IS lens. Ian SignatureIan Riches Bedford, UK |
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