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  1. #71
    Senior Member
    FredKingston's Avatar

    Re: Nikon NY Repair Center

    Quote Originally Posted by hark View Post
    I have no idea. One thing he asked is for me to turn off AF Fine Tuning. Although I forgot to do that, there isn't any value listed for just the 300mm lens since I don't use the lens alone. I am surprised by what he wrote and need to go out yet again. But it makes me wonder why would the AF Tuning affect the image if it is turned on without being set to any number.

    This is what he wrote:
    That would make sense to me Cindy. If all your images have AF Fine Tune turned ON... then trying to analyze image sharpness between the two states would be impossible. AF Fine Tune adds a focus bias... If all images are from the same state "ON"... then it becomes impossible to determine exactly what bias is being applied from one lens to the next and whether the AF Fine Tune is even actually working. IOW, if your AF Fine Tune for lens X is a +5, is it really adding a +5 and NOT a -10? Or if is a +5, is it really even adding a +5 at all? Without the camera and lens in hand to test, it would be difficult to determine without two images, one with +5 and one with AF Fine Tune OFF or at base 0...


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  2. #72
    Staff
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    hark's Avatar

    Re: Nikon NY Repair Center

    When I was out testing this lens again today, I noticed something. I hold the back button (only using the center focus point as single point focus), and press the shutter button. As the camera takes the image, immediately before the mirror closes in the viewfinder, I see the image jumping slightly within the frame - making my subject no longer exactly in the center. And since I have the focus point enabled on my rear screen, quite often the focus point isn't on top of my subject because of the image moving. And that is more of a VR issue than anything. And it's possible with me holding down the back button, the camera might refocus in that moment and focus on whatever the focus point lands on. I'll see if I can take a photo of the rear display showing how the focus point is no longer on a subject. At least that might be one reason.
    Cindy - D750, D500, D7200
    My 2021 Thread

    Where the Spirit does not work with the hand, there is no art
    -- Leonardo da Vinci



  3. #73
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    hark's Avatar

    Re: Nikon NY Repair Center

    Nikon NY Repair Center
    Here are a couple from yesterday's outing. Considering both are cropped quite a bit, and the focus point moved partially off of them, the sharpness isn't too bad. I focused on the face which is slightly soft. It's having to wait the extra time for the VR to settle that is a big pain. But if the focus point had focused way behind, then neither would have been acceptable.

    Nikon NY Repair Center-_5dx5293-low-res.jpg

    Nikon NY Repair Center-_5dx5294-low-res.jpg
    Cindy - D750, D500, D7200
    My 2021 Thread

    Where the Spirit does not work with the hand, there is no art
    -- Leonardo da Vinci



  4. #74
    Senior Member
    Needa's Avatar

    Re: Nikon NY Repair Center

    Quote Originally Posted by hark View Post
    When I was out testing this lens again today, I noticed something. I hold the back button (only using the center focus point as single point focus), and press the shutter button. As the camera takes the image, immediately before the mirror closes in the viewfinder, I see the image jumping slightly within the frame - making my subject no longer exactly in the center. And since I have the focus point enabled on my rear screen, quite often the focus point isn't on top of my subject because of the image moving. And that is more of a VR issue than anything. And it's possible with me holding down the back button, the camera might refocus in that moment and focus on whatever the focus point lands on. I'll see if I can take a photo of the rear display showing how the focus point is no longer on a subject. At least that might be one reason.
    My 70-300 will do this occasionally. Never determined if it was related to VR or the mirror moving. Don't seem to have the problem with any other lens. Maybe only happens on longer focal lengths. Are you able to duplicate it when not using BBF?
    Would it be helpful to turn on focus point in playback? It might give an indication as to whether the camera thought it achieved focus and where. Be interesting to try on a mirrorless.

  5. #75
    Staff
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    hark's Avatar

    Re: Nikon NY Repair Center

    Quote Originally Posted by Needa View Post
    My 70-300 will do this occasionally. Never determined if it was related to VR or the mirror moving. Don't seem to have the problem with any other lens. Maybe only happens on longer focal lengths. Are you able to duplicate it when not using BBF?
    Would it be helpful to turn on focus point in playback? It might give an indication as to whether the camera thought it achieved focus and where. Be interesting to try on a mirrorless.
    I have the focus point enabled for playback. It only happens in Normal VR, not Sport or without any VR. This is the only lens I have that I've noticed it happens.
    Cindy - D750, D500, D7200
    My 2021 Thread

    Where the Spirit does not work with the hand, there is no art
    -- Leonardo da Vinci



  6. #76
    Staff
    Admin
    hark's Avatar

    Re: Nikon NY Repair Center

    Nikon NY Repair Center
    My D500 hasn't been focusing well at all lately despite cleaning its contacts as well as the contacts of my lenses. The thing is it seems almost every time I clean a lens' contacts, there is a small bit of grime that comes off on my Pec Pad. Makes me wonder where it comes from since I haven't used the lens too much between cleanings.

    So this week I cleaned the contacts inside the D500 yet again. But this time I wrapped a Pec Pad around my finger - DRY not moistened like I've done in the past - and reached to the back of the body's contacts. There was a flat triangular piece of black stuff between 1/8" to 1/4" in diameter that came off. Afterwards when I tested the D500 with my 80-400mm lens, the difference in sharpness was quite noticeable.

    But when I attended the falconry event yesterday, I was hesitant to use my D500. So I opted for my first D7200 (which was out of commission for a couple years) along with the 80-400mm. I had far more in focus than I've had in the past when I used the D500. The only problem I experienced was trying to engage the back button while wearing gloves along with glove liners.

    So Jake @BackdoorArts also attended and was super nice to meet up early to test my D500 and 300mm f/4 PF. He took one photo of a bush, previewed the back, and said 'it looks sharp to me.' We chatted a bit then walked over the snowy field to get closer to some bushes. Small birds were flying around, but with my 300mm, they were still pretty far away. I figured it would be a good test to see if there was any improvement to the focus. One issue I've had is getting consistently focused images of birds in flight.

    I took a handful of test images. Almost everything was in really good focus especially considering how far away they were. Here are a couple of examples.

    This one is an uncropped image edited with my normal workflow.

    Nikon NY Repair Center-_5dx9083-uncropped-low-res.jpg

    Here is a cropped version - which is a rather extensive crop - also using my normal workflow.

    Nikon NY Repair Center-_5dx9083-low-res.jpg

    And here is another image already cropped quite a bit and edited. The AF might have caught a branch, but it's still FAR superior in sharpness considering the results I've been dealing with for a long time.

    Nikon NY Repair Center-_5dx9087-low-res.jpg

    All my problems started with the refurbished Nikon 1.7x TC that I purchased 2-3 years ago. But I don't want to give up in it just yet. When it works well, its results are impressive. So hopefully this week I will be able to test it out with the 300mm f/4 PF again and see if the focusing and sharpness is more consistent.
    Cindy - D750, D500, D7200
    My 2021 Thread

    Where the Spirit does not work with the hand, there is no art
    -- Leonardo da Vinci



  7. #77
    Senior Member
    Needa's Avatar

    Re: Nikon NY Repair Center

    Hopefully the solution.

  8. #78
    Staff
    Admin
    hark's Avatar

    Re: Nikon NY Repair Center

    Quote Originally Posted by Needa View Post
    Hopefully the solution.
    Thanks, Jeff. I really want the 1.7x TC to work with my 300mm f/4 lens and will be testing it out for the umpteenth time. When it works, it is a phenomenal combo. But most of the issues I've had involve images taken at a distance as well as flying birds and/or low contrast birds (already have the AF calibrated automatically in the D500). Jake suggested calibrating the combo manually which I can also do. Images taken from a closer distance are impressive. Considering how well my D500 worked with the 80-400mm lens after removing the black substance from the camera's contacts, I am interested to see if there will be any improvement using the combo on my D500.
    Cindy - D750, D500, D7200
    My 2021 Thread

    Where the Spirit does not work with the hand, there is no art
    -- Leonardo da Vinci



  9. #79
    Staff
    Admin
    hark's Avatar

    Re: Nikon NY Repair Center

    Nikon NY Repair Center
    Since I tested out the 300mm lens on my D500 Saturday - small birds at a distance and was impressed - I went out on Monday with this lens and the 1.7x TC. Nope. Everything was soft. This one I managed to sharpen enough although it is excessively sharpened. It was the best of the images I took.

    Nikon NY Repair Center-_5dx9106-low-res.jpg

    But just to be sure, yesterday I went out with just the lens, and it performed very well. So cleaning off grime from the lens' contacts as well as the contacts inside the D500 body seemed to resolve the issue with the lens. Obviously the refurbished 1.7x TC just isn't going to cut it.

    So today I went out with the 300mm and the 1.4x TX on my D500 and came across this Red-Tailed Hawk. The lens does very well with this 1.4x TC which hadn't been the case ever since I began having issues with the lens.

    So question for anyone - and there is no wrong answer here - the background and the hawk are pretty much the same color and brightness. I darkened the background as well as lightened it yet didn't like either. Both of these are 'as is' so to speak since none of the changes to the background were pleasing. Curious what others think they'd prefer ... a darker or lighter background Or would it be best just to leave it as is?

    Nikon NY Repair Center-_5dx9298-low-res.jpg

    Nikon NY Repair Center-_5dx9303-low-res.jpg
    Thanks/Like BeegRhob Thanks/liked this post
     
    Cindy - D750, D500, D7200
    My 2021 Thread

    Where the Spirit does not work with the hand, there is no art
    -- Leonardo da Vinci







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