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PostPosted: Mon May 04, 2009 4:33 pm 
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Joined: Sun Jun 24, 2007 12:20 pm
Posts: 33
Location: Chicago, IL USA
I just received a TAMRON 18-270MM lens for my Canon Rebel XSi.

The lens will only zoom (by rotating the ring from the wide-angle end to about 100mm where it will not extend further toward the zoom (270 mm) end of the range. However, if the extended lens tube itself is rotated, it will continue to extend to its full extent (and back again with no problem).

So, when zooming with the knurled ring, it hangs at ~100mm and can only be extended from there by turning the lens tube itself. And it can be continuously and smoothly extended from 18 => 270 (and back again) by during the lens tube itself (but not with the knurled ring).

The lens is clearly defective, but while I wait for a response from the eBay seller from whom I purchased it, I thought I'd just drop a post over here to see if there is any "home remedy" for this issue.

Thanks.


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PostPosted: Mon May 04, 2009 4:51 pm 
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Joined: Sun May 25, 2008 12:48 pm
Posts: 8025
Location: UK
The lens is known to be stiff in the middle part of the zoom. Might be tight if pointing upwards, but should be ok horizontal or pointing downwards.

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PostPosted: Mon May 04, 2009 5:12 pm 
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Joined: Sun Jun 24, 2007 12:20 pm
Posts: 33
Location: Chicago, IL USA
popo wrote:
The lens is known to be stiff in the middle part of the zoom. Might be tight if pointing upwards, but should be ok horizontal or pointing downwards.


I think I had read something about that. But this is beyond tight. Once it starts to hang, if you continue to twist the ring, it (the ring) will eventually free itself, but the lens itself doesn't move at all).


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