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Odd difference in picture quality on Oly 14-42 vs Oly 14-42 IIR

Discussion in 'Native Lenses' started by Eskil, Jun 8, 2013.

  1. Eskil

    Eskil New to Mu-43

    4
    Jun 8, 2013
    Hi, I have an Oly e-pl1
    To speed-up autofocus I've bought a 14-42IIR to replace my first generation ED14-42. It is indeed much faster at focusing, and much more quiet. And smaller.

    However, I get some very strange out of focus like effects in some parts of the photos.


    old lens: (ED 14-42)
    https://dl.dropboxusercontent.com/u/2688195/gammel.JPG

    new lens: (14-42 IIR)
    https://dl.dropboxusercontent.com/u/2688195/ny.JPG

    This is taken at 14mm, Aperture program, 3.5, 1/320, ISO 200, super fine, in my back yard. (yes, I need to move my lawn!)

    Notice how a grass and bamboo in the right side of the picture is totally unsharp on the new lens. But at least as sharp in othe places.

    I wonder if this could be due to lens distortion correction in the camera? According to olympus (I called and asked), the new lens should be corrected perfectly even though it's newer than the camera.

    Did anyone see the same phenomena?
     
  2. Ian.

    Ian. Mu-43 All-Pro

    Mar 13, 2013
    Munich
    Ian
    Yes the right side of ny is worse. It is also noticable on the left side of the table.
    Yet the top and left side of the frame seem to be the same as each other.
    Is this repeatable? Have you tried it at different apertures?
    I suggest you cut the lawn and try it again to see if that helps.
     
  3. PaulGiz

    PaulGiz Mu-43 Veteran

    231
    Jan 3, 2013
    Rhode Island, USA
    Looks like CA to me. Sharpness is the same, but the bamboo is high contrast against the sky and the softness on the new lens looks to me like fringing.

    P.
     
  4. mpg01

    mpg01 Mu-43 Regular

    154
    Oct 21, 2012
    Was this tripod mounted? I assume it was. I would see how repeatable it is. Maybe replace the lens. What you're describing is apparent in the photo.
     
  5. Ian.

    Ian. Mu-43 All-Pro

    Mar 13, 2013
    Munich
    Ian
    Ask for a replacement. Then take the same shot. If that is as bad, keep replacing it til you get one that is acceptable. That last bit is optional though.
     
  6. Eskil

    Eskil New to Mu-43

    4
    Jun 8, 2013
    Thanks for your comments. I cut the lawn, that didn't help. I also tried at different apertures and focal length, it's totally repeatable. So unless someone can tell me they see the same problem with the E-PL1 and the new 14-42 II R kit-lens, I guess my lens is a monday version.
    An odd thing is that it aims repeatably more right and low than the old lens. Maybe one of the groups are off center? I bought the lens from someone who bought a kit (and wanted to go fixed lens), so it's pure loss.
     
  7. jamespetts

    jamespetts Mu-43 Top Veteran

    803
    May 21, 2011
    London, England
    Are you sure that you have the same focus point on both? The image taken with the newer lens seems to have a focus point further back than that taken with the older lens.
     
  8. betamax

    betamax Mu-43 Regular

    195
    May 7, 2011
    NSW, Australia
    Alan
    try the brick-wall test or newspaper test. That should show up any out of focus areas quiet easily.

    I had a kodak camera with a wonky lens. Shot a brick wall with the camera mounted on a tripod. I also did a boxed X with white string and nails to stand out against the red brick, and it nicely showed the flaws with the lens which I attached when sending the lens back for repair as it was still under warranty.
     
  9. Eskil

    Eskil New to Mu-43

    4
    Jun 8, 2013
    Thanks for the suggestions.

    lawn with old lens:
    https://dl.dropboxusercontent.com/u/2688195/lawn old.JPG
    lawn new lens: (error bottom right)
    https://dl.dropboxusercontent.com/u/2688195/lawn new.JPG


    Brickwall old lens
    https://dl.dropboxusercontent.com/u/2688195/brickwall 1 old.JPG
    Brickwall new lens
    https://dl.dropboxusercontent.com/u/2688195/brickwall 1 new.JPG

    Newspaper old lens:
    https://dl.dropboxusercontent.com/u/2688195/newspaper old.JPG
    Newsaper new lens: (here the error moved up left! - closer focus)
    https://dl.dropboxusercontent.com/u/2688195/newspaper new.JPG

    Thanks for your helpfullness.
     
  10. betamax

    betamax Mu-43 Regular

    195
    May 7, 2011
    NSW, Australia
    Alan
    Yes, definitely a bad copy of the lens. I'd get it replaced.