Used 16-50 DA* Problems

1991Chall · 01-25-2015, 04:13 AM

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.

**Rondec** · 01-25-2015, 04:37 AM

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.

fwbigd · 01-25-2015, 07:02 AM

None of that should be happening. Return it immediately it is defective.

K57XR · 01-25-2015, 07:46 AM

Originally posted by 1991Chall

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.

1991Chall · 01-25-2015, 08:40 AM

Thanks for everyones comments. Lens is being sent back.

**UncleVanya** · 01-25-2015, 12:37 PM

Was it a direct Amazon warehouse deal or a 3rd party resold by them?

1991Chall · 01-25-2015, 12:55 PM

Originally posted by UncleVanya

Was it a direct Amazon warehouse deal or a 3rd party resold by them?

It was a 3rd party seller.

01-25-2015, 04:13 AM	#1
1991Chall New Member Join Date: Dec 2014 Posts: 17	*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.

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01-25-2015, 04:37 AM	#2
Rondec Loyal Site Supporter Join Date: Mar 2009 Location: Gladys, Virginia Photos: Gallery Posts: 27,653	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
fwbigd Veteran Member Join Date: Jun 2007 Location: Fort Worth TX Posts: 339	None of that should be happening. Return it immediately it is defective.

01-25-2015, 07:46 AM	#4
K57XR Veteran Member Join Date: Feb 2011 Location: Colorado, USA Posts: 830	Originally posted by 1991Chall 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
1991Chall New Member Join Date: Dec 2014 Posts: 17 Original Poster	Thanks for everyones comments. Lens is being sent back.

01-25-2015, 12:37 PM	#6
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,407	Was it a direct Amazon warehouse deal or a 3rd party resold by them?

01-25-2015, 12:55 PM	#7
1991Chall New Member Join Date: Dec 2014 Posts: 17 Original Poster	Originally posted by UncleVanya Was it a direct Amazon warehouse deal or a 3rd party resold by them? It was a 3rd party seller.