Tamron 150-600, help needed

Discussion in 'Nikon Cameras' started by Ted Evans, Sep 25, 2015.

  1. Ted Evans

    Ted Evans TPF Noob!

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    I am looking for some help with the Tamron 150-600. Using a Nikon D7100 and a D800e, I get very good images up to about 50-75 feet but anything beyond that, the resolution is terrible. I am using a Gitzo tripod with VC off and ISO of 400-1000, F8 & SS of 600-1500. Any suggestions would be greatly appreciated.


     
  2. Braineack

    Braineack Been spending a lot of time on here!

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    Last edited: Sep 25, 2015
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  3. astroNikon

    astroNikon 'ya all Bananas I tell 'ya Supporting Member

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    ^^ not much prop blur ?? :)

    I use the same lens on a d7000 and now a d600 with no issues.
    I use mine for soccer, flying aircraft, the moon and a bunch of other things. And other than the hiccup below I have no issues.

    Sometimes the AF doesn't work and seems to stop working from time to time. You have to disengage the lens from the body. Then it starts working again.

    From your description is it not autofocusing?
    can you manually focus something past 75 feet?
     
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  4. Ted Evans

    Ted Evans TPF Noob!

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    The first one is approximately 30', 1/1000, f8, ISO 400, 600mm, D800e on tripod, VC off. _DSC3620.jpg
    This one is about 150', 1/1000, f8, ISO 400, 600mm, D800e on tripod, VC off.

    _DSC3640.jpg
    The focus point of both images is on the eye and I have had the same experience with other subjects. There must be something that I am doing wrong. I will try it today using manual focus and see if that makes a difference.
     
  5. JacaRanda

    JacaRanda Hobbyist Birdographer

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    I don't see anything wrong with the first image. The eye is sharp. Are you concerned that the shoulder and rest of the right wing are not?
    The second one is a tougher call, but unless the atmosphere is super clear between you and the subject at that distance - typical with that lens (in my experience).

    Have you done micro adjustment on the lens?
     
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  6. Ted Evans

    Ted Evans TPF Noob!

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    I have been very satisfied with the images out to 30-40', it is only the ones at some distance that are unsatisfactory. I am happy with the first image as it is, the second one I am not at all happy with and it was a clear morning. Yes, I have fine tuned the AF. Thanks for the comments.
     
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  7. Ted Evans

    Ted Evans TPF Noob!

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  8. Braineack

    Braineack Been spending a lot of time on here!

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    i have no issues with same subject/distance:

    [​IMG]
    Blue Heron
    by The Braineack, on Flickr


    although it wasn't very sharp at 100%:

    upload_2015-9-25_13-25-0.png upload_2015-9-25_13-25-0.png
     
    Last edited: Sep 25, 2015
  9. jsecordphoto

    jsecordphoto Been spending a lot of time on here!

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    I notice the same thing with mine, closer subjects are nice and sharp but at a distance, not so great.
     
  10. Braineack

    Braineack Been spending a lot of time on here!

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    ill fool around with it this weekend. ill be taking it to the zoo on columbus day weekend as well.
     
  11. astroNikon

    astroNikon 'ya all Bananas I tell 'ya Supporting Member

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    That second one you are right. It looks like you took a photo through glass.
    The tree branches when you zoom in looks like it has duplicate ghost branches. But at shutter 1/1000, f/8, 600mm, -0.5step it shouldn't do that.
     
  12. Braineack

    Braineack Been spending a lot of time on here!

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    was VC still active at the 1/1000sec shutter speed?
     

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