Nikon D800, back focus

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11.07.2018 12:50:00
Hello. Met with the front-focus in the lens, but did not meet in the cameras.
Nikon D800, it catches back-focus. On different objective lens, but anyway. For example, the Tamron 24-70 f / 2. 8 and G1 and G2) more catches by 24 mm, by 70 all more or less norms.
Has anyone encountered?
 

11.07.2018 13:42:00

What specifically are you interested in?

How did you determine that there was a problem before in the lens, and now - in the camera? Can I see examples of blunders? How does the camera work with native lenses from Nikon?

11.07.2018 18:36:00
... Hello. Met with the front-focus in the lens, but did not meet in the cameras.
Nikon D800, is catching back-focus. On different objective lens, but anyway. For example, the Tamron 24-70 f / 2. 8 and G1 and G2) more catches by 24 mm, by 70 all more or less norms.
Has anyone encountered?
Somehow was suffering from garbage tried to fine tune the AF and noticed the following: the accuracy of the AF changes depending on where it was previously upset manually - in the front or in the back. . And this dependence manifested itself on different devices and with different glasses. Pay attention, if interested. .

11.07.2018 21:43:00
:

What specifically are you interested in?

How was it determined that there was a problem in the lens before, and now in the camera? Can I see examples of blunders? How does the camera work with native lenses from Nikon?
I meant that I saw when the lens is back-up or front-focus (not on my camera, at all), but I have not seen it with a camera before. I realized that the case in the cell, when the same situation was repeated with 4 lenses, and on other cameras with the same problems there is no problem.
With native Nikkor 50 f / 1. 8G behaves the same way: back-focus, we had to adjust the adjustment by 20 points (maximum value). Checked with 2 copies of

:
:
Hello. Met with the front-focus in the lens, but did not meet in the cameras.
Nikon D800, it catches back-focus. On different objective lens, but anyway. For example, the Tamron 24-70 f / 2. 8 and G1 and G2) more catches by 24 mm, by 70 all more or less norms.
Has anyone encountered?
Somehow suffered crap tried to fine tune the AF and noticed the following: the accuracy of the AF changes depending on where it was previously upset manually - in the front or in the back. . And this dependence manifested itself on different devices and with different glasses. Pay attention, if interested. .
I do not understand, explain, please

11.07.2018 22:10:00

Specifically, the D800 had a lot of marriage, the AF card was crooked, in whole series of cameras. I recommend service.

You can search in Google
https: // photographylife. com / nikon-d800-asymmetric-focus-issue

https: // www. slrlounge. nikon-acknowledges-d800-le ... fix-is-available /

Nikon acknowledged the problem, although of course the local fans will all deny it.


11.07.2018 22:13:00
I do not understand, please explain [/ q]
Usually for testing do a few descents, to avoid accidental errors. The presence of a tripod and a special target is mandatory. And before each descent, the image must be manually unfocused, either to the front or back.

11.07.2018 22:21:00

As you previously determined that the reason is in the glasses, I still do not understand, but it does not matter.

If two native fifty kopecks on your D800 give a stable undershoot, then, of course, there is reason to suspect it is the camera. In this case, the trip to the service shines, otherwise it does not. Can you show examples of pictures? Select some contrasting target object and make two frames of meters with 5: one - with phase focusing, the second - with contrast (in LiveView mode)? With a tripod, of course.

I would have forgotten about Tamron for a while. Understand first with native optics.

:
Specifically, the D800 had a lot of rejection, the AF board
was crooked. The crookedly installed AF module may give blunders at peripheral points. The central one should still work fine.

11.07.2018 23:01:00
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A crookedly installed AF module may cause blunders at peripheral points. The central one should still work fine.
Depends on how much the curve is set. It's good that the discussion goes on in an independent branch.

11.07.2018 23:26:00

I saw just one camera from the first installment with the mentioned defect. And he showed up only at the extreme points on the left side. This is what other people write about. But to you, from the height of your personal "experience" with the D800, it is certainly more visible, yes.

11.07.2018 23:29:00
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You do not have personal experience either. I have the same experience with real owners. Nothing is worse than yours. I'm sorry to erase my message from you in this case it will not work

11.07.2018 23:49:00
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You also do not have personal experience.
Except for the experience of shooting on your D800E and studying someone else's same camera with a defect. Your " communication experience " , of course, much more weighty.

And about rubbing or not rubbing messages with garbage let the topic author is soared.

12.07.2018 0:03:00
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D800E
Dude, are you confusing the D800 and D800E? I have not seen any complaints about the latter and in this branch it is offtopic.
And as we remember all the rubbing or rubbing posts
Well, as any criticism of their new cameras Nikon fans tinder -) and then again in the other accused

12.07.2018 0:13:00

You're just not in the subject, so do not know on what cameras the problem occurred. On offtopic - complain to the moderator.

12.07.2018 0:41:00

You are not in the subject + in complete denial of any problems with Nikon, including not only the D800, but also the D600. Alas, the fanaticism of pure water.
 

12.07.2018 1:44:00
Specifically, the D800 had a lot of rejection, the AF board
was crooked. Curving the installed AF module can give blunders at peripheral points. The central one should still work fine.
I forgot to mention that the problem did not appear from the moment of purchase, but was " purchased " . At first I thought about the lens, introduced a correction.

In fact, there are so many nuances in the spell that I myself can not pinpoint the simtomy: at first everything was ok, then Nikon's 50 mm started front-focus. I entered the correction and forgot for a while, then I took the same 50-person from him, which he definitely got into focus, and I again had back-focus, with the same correction as with the first obektive worked normally. Still not sinning on the camera.
Then I bought the tamron 24-70 f / 2. 8 and he did not back-focus, but at one point he began to give back focus to the FF 24-50 mm, and by 70 mm everything was in focus.
I still sinned on the obektiv (I dropped it a month earlier), but doubts crept in. After 2 days I need to go abroad for work, time to repair the camera or lens is not, I bought a new Tamron 24-70 f / 2. 8 G2 and the same story: 24 mm back-focus, 70 mm all ok.

Tomorrow I will try to conduct a series of tests with phase and contrast autofocus (yesterday I gave the camera to clean the matrix, at the same time blow the area with the sensors of autofocus).

12.07.2018 2:39:00

I recommend concentrating on the fifty-kopeck piece. Do with it a series of test shots, and Tamron while laying.

Once the problem did not manifest itself immediately, then the factory marriage with the skew of the autofocus module does not exactly speak.

13.07.2018 1:58:00
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Once the problem has not manifested itself immediately, then the factory marriage with the skew of the autofocus module does not exactly speak.
If I understood correctly, the problem immediately manifested itself
With native Nikkor 50 f / 1. 8G behaves the same way: back-focus, we had to adjust for 20 items

13.07.2018 5:07:00
:

Specifically, the D800 had a lot of marriage, the AF board was crooked, in whole series of cameras. I recommend service.



Addition of 11. 07. 2018 22: 10:

You can search in Google
https: // photographylife. com / nikon-d800-asymmetric-focus-issue
is when the focus is normal on the center point, but does not strike the side.
and the other case is described by the top-starter

13.07.2018 8:38:00
Did they break the key e? Reading hurt.

13.07.2018 10:25:00
:
If I understand correctly, the problem immediately manifested itself
incorrectly.
:
I forgot to mention that the prolem appeared not from the moment of purchase, but was " purchased " .

13.07.2018 10:42:00
I think it's useless - our " expert " not the reader

13.07.2018 14:39:00

I quoted the quote, especially for stupid fans. A little disappointed with your answer.

13.07.2018 14:56:00
Exactly as expected - not the reader

13.07.2018 17:57:00
Hello. Today I conducted a more detailed test.
On both Tamrons and on Nikorra the situation is the same on all focus: strong back-focus in the phase-focusing mode when using any point. When the correction is made at -20, the situation is greatly improved, but there is no full sharpness, that is, the back-focus lies outside the correction at -20.
This occurs in all focus and AF-S point, auto, AF-C, manual focus modes , when you press a button, the camera shows a green dot.

In this case, in the contrast-focusing mode, everything is in order.

Obviously, the problem in phase focusing: in the sensor or " brains " , but I have little idea how the problem could appear over time. Is it possible to replace the focus sensor and how much does it cost?

13.07.2018 18:08:00
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The fact that the problem is equally apparent on any glass and at all focus points - in a sense, good. So it must be eliminated by some relatively simple action.

Exactly how to execute " treatment " - will determine the service. The range of adjustments that are available to them is greater than what can be done with AF Fine Tune. It is not at all obvious that it is the replacement of the focusing module that is required. Be ready to do right in the service center and show pictures where you can see blunders. The better and more accurately describe the situation, the faster everything will be done and the less time and nerves will be spent.

Take a camera and a native fifty kopecks with you.

Have fun!

P. S. At the cost, unfortunately, I will not tell you anything. I did not have experience with replacing sensors.
 

13.07.2018 18:50:00
:
:
The fact that the problem is equally apparent on any glass and at all focus points is in some ways good. So it must be eliminated by some relatively simple action.

Exactly how to execute " treatment " - will determine the service. The range of adjustments that are available to them is greater than what can be done with AF Fine Tune. It is not at all obvious that it is the replacement of the focusing module that is required. Be ready to do right in the service center and show pictures where you can see blunders. The better and more accurately describe the situation, the faster everything will be done and the less time and nerves will be spent.

Take a camera and a native fifty dollars with you.

Have fun!

P. S. At the cost, unfortunately, I will not tell you anything. I did not have experience with replacing sensors.
Thanks, I'll contact the service. Toch, that the problem is manifested everywhere and equally - of course, well.
but I can contact the service only after 4 months (

Thanks for the help
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Nikon D800, back focus

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