Ghost Images with (Tamron) VC lens

Discussion in 'Photography' started by Mike Trainor, Oct 21, 2013.

  1. Mike Trainor

    Mike Trainor Guest

    I busted the lens that came with my Nikon D70 and the
    guys at the store pushed a Tamron 18-270 mm lens
    with image stabilization as a good alternative to the
    pricey Nikkor lens.

    I had to buy it just before leaving for vacation and
    did not test it out much. Some photos are okay, but
    many, even those shot in broad daylight (we are
    talking Spain) show distinct ghosts along edges.
    I have seen some photos on the web that had to
    same effect and I wondered what that was (as
    there should have been no shadow) and much to
    my disgust, when I blew up my shots, there they
    were.

    My question in whether the vibration cancelation
    can actually add artefacts to the image? Tamron
    says that for VC to work properly, it takes about
    3-4 seconds of keeping the shutter button half
    way down. Well, my shots are at 1/300 s, or
    faster, in broad daylight. Can the VC induce
    fake stuff in these conditons?

    Of course, I am now going to shut it off. I will
    test it out and see if I see similar artefacts.

    If you need an example, I can post, but I understand
    that this is not a binary group.


    thanks
    mt
     
    Mike Trainor, Oct 21, 2013
    #1
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  2. Mike Trainor

    Tony Cooper Guest

    I have a Tamron 18-270 with VR (vibration reduction) that I use with
    my Nikon D60. With the D60, a AF-S lens is required. I bought the
    lens on recommendation of a fellow I shoot with sometimes who has one,
    but his Nikon does not require an AF-S lens. My daughter has the same
    lens that she uses with a Nikon D40 and her husband uses with a Nikon
    D200.

    No reported problems similar to yours with any of these users.

    I don't know about the others, but I do not turn the VR off when
    shooting, and don't see the 2-3 second delay you mention. I do think
    the lens is less sharp at full zoom, so I pull it back just bit.

    To post a sample of your shots, use a (free) image host like Dropbox
    and create a link to your image.

    Upload a shot with the problem, provide the EXIF data, and I will use
    mine to try to replicate as best I can the same shot and post it. Use
    some common scene so I can replicate it.
     
    Tony Cooper, Oct 21, 2013
    #2
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  3. Mike Trainor

    Mike Trainor Guest

    Well, this has been a lesson! To get to the core of it, there is no
    problem.

    Remeber I said that I have noticed similar problems with photos on
    the web? That should have been a clue. In any case, I began to
    see ghosts on webpages with just text. Looking more closely showed
    ghosts everywhere -- even on the desktop. That gave it away. It was
    not in the pictures. A little messing around revealed that the problem
    was a loose cable. i guess the cleaing ladies moved things around.
    Once secured, it all went away.

    Funny that it showed up in photographs first. I suppose one views
    them more critically.

    thanks
    mt
     
    Mike Trainor, Oct 23, 2013
    #3
  4. Mike Trainor

    Hactar Guest

    Also it would be at different image-pixel offsets at different
    magnifications. I had a ghost of about 9 screen-pixels due to a too-thin
    monitor cable. Better (thicker, more shielding) cable fixed it right up.
    Probably analog cables are rather more susceptible to this than digital
    ones.
     
    Hactar, Oct 23, 2013
    #4
  5. Mike Trainor

    Mike Trainor Guest


    Thanks for this hint. I am not sure about what the differnce between
    analog and digital cables are, but I will keep this in mind.

    Amazingly, this occured just when I switched lenses!

    mt
     
    Mike Trainor, Oct 24, 2013
    #5
  6. Mike Trainor

    Hactar Guest

    By "analog cables" I meant "monitor cables carrying analog data", i.e.
    those with VGA ends. I don't know what DVI's failure modes are when you
    get any image at all.
     
    Hactar, Oct 24, 2013
    #6
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