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09-11-2009, 01:32 AM   #1
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Defect Tamron 90mm f2.8 Di ???



I just received my Tamron 90mm f2.8. Yes, the macro lens.

But when I hold the lens in my hand and turn it around, I hear some noise.
Just like a tiny metal ball that is inside the lens. And not fixed of course, so it's like a rain-stick (the instrument) with only one rice-seed in it.

For those who own the same lens, is this normal, or is this a defect lens???

Thanks a lot!!


Last edited by ezechiel; 09-11-2009 at 01:42 AM.
09-11-2009, 02:27 AM   #2
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I dont have that lens but if in doubt return for a replacement


cheers
09-11-2009, 02:50 AM   #3
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The problem is that I bought it in Hong Kong (citywide online shop).. So if other users experience the same noise,
I guess it's ok. If not, I'll have to send it back... and then, when receiving the new one, I'll have to pay custom taxes, again...
09-11-2009, 03:22 AM   #4
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ezechiel, I have the lens you mention and its makes no noise and operates smooth has glass. The IQ is great has well.Good lens and Good Luck
Mike

09-11-2009, 03:29 AM   #5
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ok,
I'll try to get the thing out of it by turning it over and over again.. And I hope that loose piece will drop out. Then I'll see what I'm gonna do, depending on what falls out... Send it back or not. Otherwise, the lens seem to operate properly, for now..

I've allready contacted the seller. I'll see what he will answer.

Last edited by ezechiel; 09-11-2009 at 03:40 AM.
09-11-2009, 05:07 AM   #6
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I just checked mine and it does the same thing. It sounds like a piece of metal or hard plastic slliding inside the lens when I move it around. Looks like it's normal.

Stop shaking it!

Gerry
09-11-2009, 05:56 AM   #7
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Lol I don't shake it like you do with a shaker. I care about the lens!
What I did is gently turning the superiour part of the lens in circles while the bottom stayed approx. at the same place. The movement is .. 'conical'?? Sorry, lack of english vocabulary

Well, I'm reliefed that I'm not the only one and thus, this would probably be normal.

It would be interesting to see what serial numbers do make that sound and which don't.
I'll modify the first post later on to reference all the lenses.

Anyone interested in such statistics?
09-11-2009, 07:57 AM   #8
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Ok, just tried it with mine and yes, I can hear something make a sliding sound. Must be a mechanical component. I'm not concerned.

09-12-2009, 10:40 AM   #9
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I don't have that sounds in mine. The only thing I hear is a faint rattle presumably from the aperture lever.
09-12-2009, 02:42 PM   #10
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I gave mine a little shake, yes there is a little rattling sound. I'm not worried.
09-14-2009, 12:52 AM   #11
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Hi,

I found what it is. I have no exact details. But it has to do with the AF/MF switch mechanism.
In AF (it must be a tiny metal ball for roll-mechanisms), it's not fixed and can roll all around the lens freely, just like the AF ring. In MF, the ball seems to be limited to a small area.

If I have some time, I'll try to find out how it works exactly. Can be interesting
10-06-2009, 08:16 AM   #12
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So, I wrote a message to Tamron, asking questions about this metal ball.

The tech guy told me "it has something to do with the aperture mechanism".
But he couldn't tell me more. Of course, no way to get construction details about this lens.

So we'll have to do with this one and only explanation (this doesnt' justifies why in AF i hear something and not in MF.. ).

If there are any lens specialists here, I would be glad to hear an explanation ^^
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