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 Moderated by: chrisbet, Page:  First Page Previous Page  1  2  3   
Nikkor 14 - 24 f2.8 AF - S........SUCCES !!!   -   Page   3
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Posted: Mon Jan 7th, 2019 13:55
 
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novicius



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Robert

To me that would suggest a moving part is being pushed into it's correct position in a support slide at the tight point but the support is broken or displaced elsewhere along it's length, therefore not correctly aligned.

Does it rattle when the tight point is reached? If not that might confirm my theory. I might be inclined to leave it in the tight point, especially if you intend to post it...

Some lenses are incredibly frail in their construction, using all sorts of ways to squeeze the complex mechanism into a tiny space. The 25-50 I had was very sharp but suffered a drop while on my D1, the D1 was fine of course!

I opened up the lens and the innards slid on three small rods which were held in position with sticky tape. The impact from being dropped, had torn two of the rods from their flimsy supports. That exhibited the same 'slack' and 'tight' feel when zooming and focusing. I liked that lens, it was small and very sharp, with good contrast but although it did improve it's behaviour, I got rid during one of my equipment culls.


Robert,...

Once Again your Assesment is Correct..Sir..
..`tho there`s a bit of rattle , it`s way way less at 16mm...

I am awaiting the arrival of some small tools ,and having " studied " that yooutoob vid.,..making me an expert of sorts,..I want to open up the rear ring to have a look see,..using adhesive tape in such a Fine Optic ??!...

Well, Nikon is No Taylor-Hobson..:-)...incidently, have you seen the prices of COOKE Lenses lately...

Would n`t mind `tho`..." dream "..:applause:



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Posted: Mon Jan 7th, 2019 14:03
 
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Robert



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Well I wish you luck, just be careful with those ribbon cables...

Off to look up Cooke lenses!

https://en.wikipedia.org/wiki/Cooke_Optics



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Posted: Tue Jan 8th, 2019 18:18
 
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novicius



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A small Victory...

The Rear Lens Group was Exenter...a bit more then I noticed at First glance,..showed in that one side of the photo had a different focus point, so , I turned the zoom ring to 14mm causing the rear lens group to come out as much as possible and inserted a piece of plastic around one mm thick where the lens was leaning outwards and then turned the zoom ring to 24 mm ,it pulled the plastic with which then pushed the lens opposite way and after several tries the Rear Lens Group is Centered again, tests show the Lens is near perfect,I can n`t do it better then this,the jamming at 16mm is still there ,altho` it is less now,so there`s still something ,but at least now I`ve got a 14-24 that can be used.



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Posted: Tue Jan 8th, 2019 23:51
 
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Robert



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Well done, Sounds like the rear slide is broken or cracked?



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Posted: Wed Jan 9th, 2019 03:19
 
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jk



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I would suggest that the 14-24 would like a visit to a Nikon Service Centre. It will come back perfect. ;-)



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Posted: Wed Jan 9th, 2019 06:20
 
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jk



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This is a sample from my Z7 with 14-24 fitted using the FTZ adapter.

BTW: The shadowlike dark area in the foreground is NOT my shadow but moss/lichen.

Attachment: Z7-1-1217-web.jpg (Downloaded 10 times)



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Posted: Wed Jan 9th, 2019 12:50
 
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novicius



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Robert wrote:
Well done, Sounds like the rear slide is broken or cracked?

Looking at a Cut-Thru` it`s most Likely that You are Right..



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Posted: Wed Jan 9th, 2019 12:53
 
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novicius



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jk wrote:
I would suggest that the 14-24 would like a visit to a Nikon Service Centre. It will come back perfect. ;-)

Absolutely !!

..But the cost involved can be Huge....see what this gent has to say about that..

https://www.youtube.com/watch?v=bVnzAQA2B4w

So I`ll see what the immediate future brings..

Your photo shows what a Fantastic Lens it is..:applause:



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