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Archive 2020 · Sigma 24-70mm DG DN internal dust?

Newenglandrocks
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p.3 #1 · p.3 #1 · Sigma 24-70mm DG DN internal dust?

Thanks! I just called my local dealer where I purchased my lens and they confirmed that this IS a partial recall from Sigma, and there is even a precise serial number (I can't recall what) which indicates the specific lens which is the latest one produced to require the fix.

Jun 08, 2021 at 04:11 PM

Eruditass
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p.3 #2 · p.3 #2 · Sigma 24-70mm DG DN internal dust?

Newenglandrocks wrote:
Thanks! I just called my local dealer where I purchased my lens and they confirmed that this IS a partial recall from Sigma, and there is even a precise serial number (I can't recall what) which indicates the specific lens which is the latest one produced to require the fix.

I posted the serial number, it's ones beginning with 5504 and above

Eruditass wrote:
In case anyone was curious, Sigma apparently has said

There have been updates to the housing to make the lens much more dust resistant.

This has taken affect on serial numbers starting with 5504 and above. According to slickdeals, this fix has been around since at least December 2020 and Sigma fixes it under warranty, though some retailers still have older stock.

Do warranties still unofficially transfer beyond the original owner?

Jun 08, 2021 at 06:14 PM

j4nu
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p.3 #3 · p.3 #3 · Sigma 24-70mm DG DN internal dust?

I managed to get my cleaned and the sealing replaced under warranty too (in EU/Poland to be precise).
Let's see if it actually makes a difference

Aug 03, 2021 at 08:31 AM

photoduude
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p.3 #4 · p.3 #4 · Sigma 24-70mm DG DN internal dust?

I bought mine used from B&H within the year the lens was released. I thought I would be covered under their 1 year warranty but I had to pay about $120 for Sigma US to replace the rear housing and seals. It collected just as much dust after the replacement (I don't live in a dusty environment and rarely use it).

Sent it back again for re-evaluation and cleaning. Still the same story.

Aug 03, 2021 at 10:53 AM

DaveFP
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p.3 #5 · p.3 #5 · Sigma 24-70mm DG DN internal dust?

I've owned the 24-70 GM since it was introduced.

Used in it many dusty locations around the world.

No perceptible dust under the front element when viewed with an illuminated magnifier (3X).

The dust you have with the Sigma will not impact your images but it is not confidence inspiring.

Aug 03, 2021 at 11:44 AM

3catsinky
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p.3 #6 · p.3 #6 · Sigma 24-70mm DG DN internal dust?

I need to check mine and send it in. haven't noticed it, but why not??

Aug 03, 2021 at 12:36 PM

thousandths
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p.3 #7 · p.3 #7 · Sigma 24-70mm DG DN internal dust?

photoduude wrote:
I bought mine used from B&H within the year the lens was released. I thought I would be covered under their 1 year warranty but I had to pay about $120 for Sigma US to replace the rear housing and seals. It collected just as much dust after the replacement (I don't live in a dusty environment and rarely use it).

Sent it back again for re-evaluation and cleaning. Still the same story.

I keep dragging my feet about getting mine cleaned, but this brings up a question: don't Sigma lenses from US dealers have a 4 year warranty?

Aug 03, 2021 at 05:17 PM

ajamils
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p.3 #8 · p.3 #8 · Sigma 24-70mm DG DN internal dust?

thousandths wrote:
I keep dragging my feet about getting mine cleaned, but this brings up a question: don't Sigma lenses from US dealers have a 4 year warranty?

Yes, all Sigma lenses in US come with 3 years extra (total 4 years) of warranty.

Aug 03, 2021 at 05:36 PM

LAARILEY
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p.3 #9 · p.3 #9 · Sigma 24-70mm DG DN internal dust?

I have 5531, bought in Jan this year. Looking good so far.

Aug 03, 2021 at 07:15 PM

photoduude
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p.3 #10 · p.3 #10 · Sigma 24-70mm DG DN internal dust?

thousandths wrote:
I keep dragging my feet about getting mine cleaned, but this brings up a question: don't Sigma lenses from US dealers have a 4 year warranty?

Yes, they do. I was charged for half of the cost for repairs because I bought it used, according to "the" sigma rep. But my issue is that the dust accumulation still occurs after the repair. My hands are tied because their argument (while a fair one) is it's a zoom lens, it's going to suck in dust. Tell that to my 12 year old Canon 24-70 mk1...

Aug 04, 2021 at 09:48 AM

dhp.
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p.3 #11 · p.3 #11 · Sigma 24-70mm DG DN internal dust?

Dumb question - this means that there are only several thousand units of these lenses made? For some reason I expected a higher number

Aug 27, 2021 at 10:15 AM

mcbroomf
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p.3 #12 · p.3 #12 · Sigma 24-70mm DG DN internal dust?

dhp. wrote:
Dumb question - this means that there are only several thousand units of these lenses made? For some reason I expected a higher number

It's an 8 digit number, 5504 are just the 1st 4

Aug 28, 2021 at 05:34 AM

thousandths
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p.3 #13 · p.3 #13 · Sigma 24-70mm DG DN internal dust?

Finally got around to sending mine for the dust issue. Turnaround time was two business days after it was received by their NY service center. I also sent my 100-400 along for the software update that could only be applied at the factory.

It appears they replaced the entire lens, as it has a different serial number. Lens that was sent in had a serial 543XXXXX and the new one is 957XXXXX. Looks good optically in the limited sample shots I did around the house, cosmetically looks like new.

Curious if anyone else that sent theirs in had the whole lens swapped?

Sep 10, 2021 at 11:39 PM

Fred Miranda
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p.3 #14 · p.3 #14 · Sigma 24-70mm DG DN internal dust?

Is there any evidence that Sigma fixed this issue with recent batches?
It's easy to remove the front element and remove dust particles but I have never seen a recently released lens with so much dust inside.

Dec 20, 2021 at 08:16 PM

Douglas L
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p.3 #15 · p.3 #15 · Sigma 24-70mm DG DN internal dust?

thousandths wrote:
Finally got around to sending mine for the dust issue. Turnaround time was two business days after it was received by their NY service center. I also sent my 100-400 along for the software update that could only be applied at the factory.

It appears they replaced the entire lens, as it has a different serial number. Lens that was sent in had a serial 543XXXXX and the new one is 957XXXXX. Looks good optically in the limited sample shots I did around the house, cosmetically looks like new.

Curious if anyone else that sent theirs in had the whole lens swapped?

I sent in mine, they replaced the rear housing so the lens has a different serial #.

Dec 20, 2021 at 08:26 PM

photosbyjaron
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p.3 #16 · p.3 #16 · Sigma 24-70mm DG DN internal dust?

thousandths wrote:
Finally got around to sending mine for the dust issue. Turnaround time was two business days after it was received by their NY service center. I also sent my 100-400 along for the software update that could only be applied at the factory.

It appears they replaced the entire lens, as it has a different serial number. Lens that was sent in had a serial 543XXXXX and the new one is 957XXXXX. Looks good optically in the limited sample shots I did around the house, cosmetically looks like new.

Curious if anyone else that sent theirs in had the whole lens swapped?

Was the 24-70DGDN the lens that was replaced entirely? This is what concerns me and keeps us from sending ours in. We have two fairly centered and sharp copies, and I would hate to send them in and get copies that aren't as centered.

Dec 20, 2021 at 08:41 PM

MikeEvangelist
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p.3 #17 · p.3 #17 · Sigma 24-70mm DG DN internal dust?

Finally sent mine in as well. It's due to arrive back to me in a couple days.

Here's the details shown on the repair order:

"REPLACED THE COVER RING UNIT, THE REAR BARREL,
PERFORMED A DUST CLEANING AND ADDED CUSHION 1.
NEW SERIAL NUMBER"

Douglas L wrote:
I sent in mine, they replaced the rear housing so the lens has a different serial #.

Jan 13, 2022 at 10:43 AM

Alan Parker
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p.3 #18 · p.3 #18 · Sigma 24-70mm DG DN internal dust?

MikeEvangelist wrote:
Here's the details shown on the repair order:
ADDED CUSHION 1

Any idea what that might mean? It sounds like they are adding something in to perhaps prevent the issue for your copy in the future? Makes me wonder if I should sent my copy in too. I've been using mine quite a bit more recently and have noticed a pick-up in dust because of that.

Jan 14, 2022 at 03:17 AM

MikeEvangelist
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p.3 #19 · p.3 #19 · Sigma 24-70mm DG DN internal dust?

zz wrote:
Any idea what that might mean? It sounds like they are adding something in to perhaps prevent the issue for your copy in the future? Makes me wonder if I should sent my copy in too. I've been using mine quite a bit more recently and have noticed a pick-up in dust because of that.

I wondered about that too. I'm guessing that 'cushion' might mean a gasket or seal of some sort.

Jan 14, 2022 at 08:27 AM

sismailian
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p.3 #20 · p.3 #20 · Sigma 24-70mm DG DN internal dust?

I already got this incredible lens and have had no dust issues at all for about a year now. I guess maybe i got lucky and got a newer improved sealed version. I did go thru 2 copies to get a golden aligned copy. I got mine from b&h.

Besides we should see a new sony 24-70 2.8 gm ii this year so might want to save up for that if one hasn't gotten the sigma. Honestly tho the sigma is an amazing lens. I use it for landcapes and events. Super sharp and wonderful rendering + smooth bokeh.

Jan 15, 2022 at 12:29 AM

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