Tamron 18-250mm f3.5-6.3 Di II Lens - Canon Fit.
Using manual focus on a Sony NEX-5n and a panasonic GH2.
When I zoom in to 250mm then focus then zoom out, the lens looses focus around 150mm and stays out of focus till 18mm.
If I then very gently push the zoom ring clockwise (still at 18mm) it comes back into focus and, if I carry on zooming in, it will stay in focus from 18mm to 250mm.
There is very slight play in the zoom ring which causes it to go into and out of focus.
My lens is still under a 6 month warranty, but as soon as I mentioned the word "problem" on the phone the guy immediately became defensive and just carried on being blatantly defensive no matter what I said.
I sent my lens to them and , as expected, they said they couldn't find any problems.
I had uploaded a youtube vid with a detailed explanation and two very easy to see examples of the problem, but if I had handed the lens to the guy and it was on fire he would still say it was fine.
I am now going to fix it myself, I have just stripped and rebuilt a minolta beercan with no problems and I am very good a fixing pretty much anything.
Does any one have experience of stripping this lens or have a link to a dissasembly?
Do you know the exact part to fix to sort this problem?
I have found this so far which is a slightly different lens.
Using manual focus on a Sony NEX-5n and a panasonic GH2.
When I zoom in to 250mm then focus then zoom out, the lens looses focus around 150mm and stays out of focus till 18mm.
If I then very gently push the zoom ring clockwise (still at 18mm) it comes back into focus and, if I carry on zooming in, it will stay in focus from 18mm to 250mm.
There is very slight play in the zoom ring which causes it to go into and out of focus.
My lens is still under a 6 month warranty, but as soon as I mentioned the word "problem" on the phone the guy immediately became defensive and just carried on being blatantly defensive no matter what I said.
I sent my lens to them and , as expected, they said they couldn't find any problems.
I had uploaded a youtube vid with a detailed explanation and two very easy to see examples of the problem, but if I had handed the lens to the guy and it was on fire he would still say it was fine.
I am now going to fix it myself, I have just stripped and rebuilt a minolta beercan with no problems and I am very good a fixing pretty much anything.
Does any one have experience of stripping this lens or have a link to a dissasembly?
Do you know the exact part to fix to sort this problem?
I have found this so far which is a slightly different lens.
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