| Joined: | Mon Aug 13th, 2012 |
| Location: | Copenhagen, Denmark |
| Posts: | 442 |
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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 "..
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Back in Danmark
I do not use my equipment to make photo`s .. I take photo`s to use my equipment
The better I become at photography,the better my camera gets.