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  1. puddleduck

    puddleduck

    Messages:
    7,584
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    Andy Drake
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    Had a look at that - can't see an obvious problem there tbh...
     
  2. Aristoc

    Aristoc

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    Naboo32, do you think you could tell us exactly what Nikon said they did to your camera to fix it ?

    How do you know it is really fixed? Did you do the tests over again ?

    Thanks.
     
  3. Naboo32

    Naboo32

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    Andy
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    Hi, sorry for the delay - I thougt this thread had died :D.

    This is exactly what Nikon wrote on the service report:

    "Autofokus-System justieren" (Auto-focus system adjustment).

    Also, I did indeed repeat the tests that I showed earlier in this thread and this time the 'normal' AF and the Live View AF behave in the same way and the results are as good as my (problem-free) D700 when I take random 'real world' shots, as well.

    I haven't done any 'proper' photography with this camera since it was repaired, as I only really use it for wildlife stuff and the weather here in Germany has been attrocious for weeks now :(, so I haven't had the inclination to go wandering in the woods.

    Anyway, I don't want to spread paranoia amongst D90 owners with this thread :shake:. The fact is, the camera's AF was clealry mal-adjusted and this fact was very apparent with 'real world' photography. If anyone else here has a similar problem with their D90 (or other model, even), it will be very obvious to them. If you don't really notice any major problems with your day-to-day photography and have to resort to 'laboratory tests' to figure out if your D90 is AFing properly, then you probably don't have anything to worry about ;).
     
  4. Aristoc

    Aristoc

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    Thanks for getting back. I just received my D90 after I went to nikon canada for my back focus issue. I also gave them my 35 1.8 and my 16-85 lenses. I also gave them photocopies of the pictures I took and the focusing I thought was not right. Anyway, It has been two and a half weeks and I just got the camera back. I will have to re-check it. They also wrote on the invoice the same thing that you had. But, They also checked my lenses. Thanks for getting back and take care.
     
  5. Naboo32

    Naboo32

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    Andy
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    Great :)!

    Well, I hope that they have done as good a job as their German colleagues did for me. Hopefully your lenses will not be at fault, as I suspect that they might be harder to calibrate than a camera body :thinking:.

    Let us know how your test go ;).
     
  6. Aristoc

    Aristoc

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    I have to say I don't see any real difference after NIkon service.

    When I shoot in live view it is perfect everytime. Then when I switch to autofocus and half press shutter the focus ring moves towards a farther distance. Then I take the picture. When I compare it still looks like the autofocus is a little worse than in live view. I give up....

    #32 is the focus mark next to the focus target.
    [​IMG]

    another focal length, this time at 70mm
    [​IMG]

    I tried a different lens, this time my 35mm f1.8
    [​IMG]

    here is one more try at 85 mm f5.6. Am I imagining things now??

    [​IMG]

    now here it is at 85mm but at f10 instead.
    [​IMG]
     
  7. trencheel303

    trencheel303

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    But is it though? Me and a few others get the same with our 450Ds - slightly softer results in autofocus - yet in manual focus or live view it doesn't happen. Comparisons show that the autofocus system is less than perfect.
     
  8. puddleduck

    puddleduck

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    Andy Drake
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    IMHO you are looking for problems that probably were not there...

    Your 35mm f/1.8 performance is absolutely fine. f/1.8 wide open is very demanding on caliberation.

    Put the test charts and rulers away, and shoot something more interesting :)

    In real world shots, judging by your f/1.8 performance you will have no problems.
     
  9. Naboo32

    Naboo32

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    Andy
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    :( That's really disappointing. Clearly, some of these cameras do have AF alignment problems and from the tests that you've posted, I'd say (although I'm no expert) that yours was a good candidate for an AF improvement following a service. Looks like it hasn't improved at all!

    Those early shots, especially, are bordering on unacceptable in terms of softness, IMO. At least, if the 'real world' performance is the same, then I'd say that you've got every right to be p'd off :|.

    Not to 'rub it in' in any way, but just to illustrate something, here are some (fairly heavily cropped) shots, which I took at the weekend with my (cured) D90 and a Nikon lens at 200mm and f/2.8. The intended focal point was the eye of the crow, in each case ...

    [​IMG]

    [​IMG]

    Not an easy subject for an AF system, I'm sure, what with being black on black and quite small in the (original) frame :shrug:. Still, I think that the AF performance in these shots (and other random test shots at different distances on the day) is just about as good as AF gets!? It's certainly a very different story to how these same kind of shots were coming out before it was serviced.

    Again, Aristoc, I'm really sorry to hear that you're not happy with the results of the service that Nikon did (or claim to have done) for you - I was hoping for good news :(.

    Perhaps you should take puddleduck's advice and just go out and use it for a day (on various subjects) and then have a look at those results (trying to put the test results out of your mind for a while). Maybe it will perform differently in the (much mentioned :D) 'real world' :shrug:.

    Good luck!
     
  10. Aristoc

    Aristoc

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    hI
    Just wanted to conclude that my normal centre point viewfinder autofocus is equal to my live view autofocus. Thanks Nikon. Also..no dust bunnies in the camera.

    35mm
    [​IMG]

    16-85mm
    [​IMG]

    real world inside my car dash board:
    [​IMG]
    100% crop
    [​IMG]
     
  11. Naboo32

    Naboo32

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    Excellent! I like happy endings :).
     

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