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Old Sep 14, 2004, 11:28 AM   #1
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Picked up a refurbished lens from Canons E Bay shop and have just tried it on a camera.

USM focus seems fine (fast and quiet) and the Image Stabiliser makes an appreciable difference to hand held shots at slow speeds.

However, the zoom seems really notchy and is worrying me. Zooming in from 28 to 135 there is a noticeable stiff point around 50mm which takes a fair bit of pressure to overcome. Once past the 50mm point the rest of the zoom is fine and smooth.

Anyone else find this or is my lens not up to scratch?



Thanks for your help,

Nick.
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Old Sep 14, 2004, 11:59 AM   #2
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I use the same lense as my primary lense and have not noticed the problem you indicated - sounds like a problem with your particular lense.
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Old Sep 15, 2004, 8:48 AM   #3
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My lens has a'slight' hesitation in it also, I have learned to 'nudge' it a little. I have to remind myself that it is NOT and L series, so I have to make allowances.

It is irritating at times.
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Old Sep 16, 2004, 2:42 AM   #4
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Thanks for your replies.

As an update, I had convinced my self that the lens was a dud and would be going back under guarantee. Thus with nothing to lose I experimented with cleaning the extending parts of the externallens barrel wih a small dab of silicon polish. A fair amount of dust / grime was removed and the lens now zooms like a dream! So much for clean manufacturing!
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Old Sep 16, 2004, 5:44 AM   #5
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I'm looking at buying a 28-135 myself and tried one in the shop the other day (though I plan to buy on eBay), and the first thing i found was its stiffness nearer the wide angle as well, This was supposedly a brand new lens!
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Old Sep 16, 2004, 6:24 AM   #6
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Well, there goes the "perfect world" again !

I guess I would be more concerned if it was a trombone.
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Old Sep 16, 2004, 8:33 AM   #7
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:idea: Look inside the 28-135 when one zooms in and out... When one optical group moves there's a slight stiffness, when both optical groups shift there's a slight increase in "effort".

Don't worry the whole thing will get really loose eventually!
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