fatigue
Senior Member
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How I fixed a dropped AFS ED 28-70 F2.8
- Thread starter fatigue
- Start date
Thanks, here another bomb :bsmilie:
wah.. what happen to this bomb?? dropped?? :bsmilie:
Hi Paul, first of all, welcome to Clubsnap. Im glad your 1st and 2nd posts are on the thread I started.
Your procedure is great!
Sometimes, you can take advantage of the difference in height of the 2 small metal pieces to slide-in the aperture control. If the 2 small pieces doesnt want to cooperate, then I use my sharpened chopstick.
Thank for helping me out! I find it really hard to describe the procedure of sliding the aperture control, a procedure that usually takes a few seconds to perform.
Isn't it nice to see more people stripping their lenses, bodies etc?
:thumbsup:
fatigue
Senior Member
Isn't it nice to see more people stripping their lenses, bodies etc?
Hey! you started it. :bsmilie:
Nah.. You've stripped more lenses than me. ;p
lohteekaya
New Member
Nice work, Fatigue!
Your fame is getting bigger!
:thumbsup:
Your fame is getting bigger!
:thumbsup:
kriegsketten
New Member
Question, how do you keep all the dust (floating around) from creeping in? I mean, that must have been quite a challenge right? Forgive my ignorance (I'm sure you must have ways to do this?)...
If you opened up one before, you'll know that they won't need collimation.
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ovaltinemilo
Senior Member
:thumbsup: Super impressive!
The moment I saw your ESD mat...I know you know your stuffs very well... Thanks for showing us how you work...even If I know the stuffs, I won't dare to open up the >thousand dollar lens:nono:
The moment I saw your ESD mat...I know you know your stuffs very well... Thanks for showing us how you work...even If I know the stuffs, I won't dare to open up the >thousand dollar lens:nono:
First time poster, long time shooter here.
Apologies for reviving an old thread, but I recently had an issue with my AF-S 28-70mm which might be similar to the one discussed in "AFS ED 28-70 F2.8 lens focus problem?" thread
When autofocussing, the lens seems to get stuck between the 3 and 5 meter mark. Sometimes when I purposely make it hunt (focus to macro and then back to infinity) the lens has a chance of getting over the 3 and 5 meter mark due to the momentum, I can see there that is some resistance as it focuses across that point. When it gets stuck, I can lightly nudge the focus ring or give it a tap and the focus will continue pass the point. It seems that something is causing the SWM to jam at that particular point in the focus track. The manual focus ring is smooth, and I do not feel any resistance when turning past 3 and 5 meters so it seems to be isolated to the SWM mechanism, which makes me think that my issue might be different to the one in fatigue's thread (just guessing). Also, my lens does not make a screeching sound when focussing. It is one of the rare few that focuses silently!
If anyone else has experienced this in the past, could you let me know if the issue was caused by the SWM? Knowing my Nikon Service Centre here, they will probably recommend replacing the SWM but that might not be the cause of the problem, especially if the loose flex circuit board is also able to cause the problem that I described above. Thanks in advance!
Apologies for reviving an old thread, but I recently had an issue with my AF-S 28-70mm which might be similar to the one discussed in "AFS ED 28-70 F2.8 lens focus problem?" thread
When autofocussing, the lens seems to get stuck between the 3 and 5 meter mark. Sometimes when I purposely make it hunt (focus to macro and then back to infinity) the lens has a chance of getting over the 3 and 5 meter mark due to the momentum, I can see there that is some resistance as it focuses across that point. When it gets stuck, I can lightly nudge the focus ring or give it a tap and the focus will continue pass the point. It seems that something is causing the SWM to jam at that particular point in the focus track. The manual focus ring is smooth, and I do not feel any resistance when turning past 3 and 5 meters so it seems to be isolated to the SWM mechanism, which makes me think that my issue might be different to the one in fatigue's thread (just guessing). Also, my lens does not make a screeching sound when focussing. It is one of the rare few that focuses silently!
If anyone else has experienced this in the past, could you let me know if the issue was caused by the SWM? Knowing my Nikon Service Centre here, they will probably recommend replacing the SWM but that might not be the cause of the problem, especially if the loose flex circuit board is also able to cause the problem that I described above. Thanks in advance!
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fatigue
Senior Member
You could be right. I have fixed quite a number of similar problem on this lens and the cause is due to loose flex circuit board.
Lucky me you're not providing the same services :bsmilie:
The culprit:
The fix:
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Thanks, here's another bomb :bsmilie:
Admit it... you like dropping things so you can have a good excuse to pull them apart and repair them. :bsmilie:
After all, "If it ain't broke, don't fix it!" Isn't that so? Anyway, keep on dropping your stuff, I like to see how you are fixing them. :thumbsup:
diediealsomustdive
Senior Member
OlyFlyer said:
Our brother Fatigue is a CS repair pro many of us turn to for a good service. Nice and approachable gentleman. Others drop them, he fixes others mistake.
...but I am sure he enjoys doing it. I also like to fix things, so I know the feeling.
avsquare
Senior Member
repairdummy
New Member
Hi Paul, first of all, welcome to Clubsnap. Im glad your 1st and 2nd posts are on the thread I started.
Your procedure is great!
Sometimes, you can take advantage of the difference in height of the 2 small metal pieces to slide-in the aperture control. If the 2 small pieces doesnt want to cooperate, then I use my sharpened chopstick.
Thank for helping me out! I find it really hard to describe the procedure of sliding the aperture control, a procedure that usually takes a few seconds to perform.
Hi Fatigue,
Thank you to show us how to open this gem and I followed your steps, unfortunately when I put back the aperture long lever that I did inserted it between 2 small metal, wide open and small closed are OK on this moment, but when I put the last metal mount back on the lens and tried out that I found could not wide open enough due to the limit space on the silver metal mount. I know I did something wrong and I don't have any reference photo to follow. Can you or other members show me the photo of the aperture mechanism assembly? Also how many tiny springs suppose inside by the
2 tiny metals? or guide me where I can find some information about it? Thank you.
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