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01-25-2015, 04:13 AM   #1
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Used 16-50 DA* Problems

Hi Everyone,

I just bought a used 16-50 off amazon and have noticed some strange things about the lens which I wanted to check were "normal" as I know this lens has its quirks.

1) Uneven sharpness across the frame at 16mm when set to Inf. Noticeable lack in the top left of the frame which is considerably worse than the opposite side.

2) Strange optics shift when the lens is manually moved to inf. It seems the frame actually shits as in some optical element is moving and it distorts the image and changes the frame fov by 1-2 degrees.

3) Noticeable wobble in the extending barrel worse than my 18-135.

I can still return it and probably will I just wanted to make sure I wasn't being too critical.


Thanks for your time.

Regards,

Chris


Last edited by 1991Chall; 01-25-2015 at 04:18 AM.
01-25-2015, 04:37 AM   #2
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It sounds like the lens is decentered, at the least. I wouldn't keep it unless you got such a good deal on it that you could afford to get it fixed. My 16-50 has a little bit of wobble in the barrel when fully extended, but not much. The rest of the things sound completely out of character for the lens.
01-25-2015, 07:02 AM   #3
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None of that should be happening. Return it immediately it is defective.
01-25-2015, 07:46 AM   #4
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QuoteOriginally posted by 1991Chall Quote
Hi Everyone,

I just bought a used 16-50 off amazon and have noticed some strange things about the lens which I wanted to check were "normal" as I know this lens has its quirks.

1) Uneven sharpness across the frame at 16mm when set to Inf. Noticeable lack in the top left of the frame which is considerably worse than the opposite side.

2) Strange optics shift when the lens is manually moved to inf. It seems the frame actually shits as in some optical element is moving and it distorts the image and changes the frame fov by 1-2 degrees.

3) Noticeable wobble in the extending barrel worse than my 18-135.

I can still return it and probably will I just wanted to make sure I wasn't being too critical.


Thanks for your time.

Regards,

Chris
Sounds like loose element. I wouldn't keep it if it were me. It may just get worse down the road.

01-25-2015, 08:40 AM   #5
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Thanks for everyones comments. Lens is being sent back.
01-25-2015, 12:37 PM   #6
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Was it a direct Amazon warehouse deal or a 3rd party resold by them?
01-25-2015, 12:55 PM   #7
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QuoteOriginally posted by UncleVanya Quote
Was it a direct Amazon warehouse deal or a 3rd party resold by them?
It was a 3rd party seller.
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