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

  
 
MikeEvangelist
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p.4 #1 · p.4 #1 · Sigma 24-70mm DG DN internal dust?


sismailian wrote:
Honestly tho the sigma is an amazing lens. I use it for landcapes and events. Super sharp and wonderful rendering + smooth bokeh.


I totally agree. It's my most-used lens.



Jan 15, 2022 at 09:56 AM
MikeEvangelist
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p.4 #2 · p.4 #2 · Sigma 24-70mm DG DN internal dust?


photosbyjaron wrote:
Was the 24-70DGDN the lens that was replaced entirely?


My repaired lens arrived today; it looks great. As others have said, it has a new serial number but it's not an all new lens. (my front element had a minuscule flaw that is still there.)

But, I was quite surprised to find that they sent back the old parts which had been replaced. Perhaps because I had a lens skin applied to the lens and thought I might like it back.

In any case, looking at the old parts I can see the gaskets or 'cushions' that are obviously there to reduce dust infiltration. Can't see inside the repaired lens, but I'd bet these gaskets were improved on the new parts.

Here's some snaps showing the gaskets.





The returned parts







Internal gasket on the zoom ring







Gasket around the extending part of the barrel




Jan 15, 2022 at 12:54 PM
photosbyjaron
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p.4 #3 · p.4 #3 · Sigma 24-70mm DG DN internal dust?


MikeEvangelist wrote:
Here's some snaps showing the gaskets.


Thanks for this info. Guess we'll start the process.



Jan 15, 2022 at 03:55 PM
EdwardDye
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p.4 #4 · p.4 #4 · Sigma 24-70mm DG DN internal dust?


I think they fixed it in the newer versions, I got one for my Dad about 8 months ago, and there is 0 dust in it after 8 months.


Jan 15, 2022 at 04:04 PM
sismailian
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p.4 #5 · p.4 #5 · Sigma 24-70mm DG DN internal dust?


That's good to hear. I am sure sigma wouldn't want one of their best sold lenses to be having a bad rep of internal dust building up. It's great just how good this lens is once you go 40-70mm which I do often for landscapes


Jan 15, 2022 at 10:14 PM
Alan Parker
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p.4 #6 · p.4 #6 · Sigma 24-70mm DG DN internal dust?


MikeEvangelist wrote:
In any case, looking at the old parts I can see the gaskets or 'cushions' that are obviously there to reduce dust infiltration. Can't see inside the repaired lens, but I'd bet these gaskets were improved on the new parts.

I really appreciate the detailed report! Quality posts like yours really help set FM apart from any other website.
I'll have to see when I can reach out to Sigma here and get mine fixed up. The change strikes me as a necessary fix.



Jan 16, 2022 at 01:08 PM
Alan Parker
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p.4 #7 · p.4 #7 · Sigma 24-70mm DG DN internal dust?


After our recent vacations this issue seems to have gotten a lot worse for me; to the point where I see it in photos after f/5.6.
I made an appointment to drop it off here at Sigma Benelux to have it fixed for me. Free of charge

Edit: All done nice and easy. It'll probably be a couple weeks now of waiting. Interestingly enough they branded the lens on the service form as 'DG DN Art SE'.



Oct 31, 2022 at 09:50 AM
Alan Parker
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p.4 #8 · p.4 #8 · Sigma 24-70mm DG DN internal dust?


I just got my 24-70 back. New serial number and a very nice and clean lens.

I tried asking if there's a 70-200 DG DN coming but they didn't want to say anything about that.



Nov 30, 2022 at 06:55 AM
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