Sigma 28 200 Repair Parts Af Motor

Sigma 28-70 f2.8 EX repair question

Vincent • Regular Member • Posts: 305

Sigma 28-70 f2.8 EX repair question

Jun 11, 2004

On my most recent travels, my Sigma 28-70 f2.8 EX started showing some mechanical problems. The foucs motor isn't able to pull the lens from infinity to near focus (and vice-versa). If I manually move the lens close to in-focus, then switch it back to auto and let the camera do it's thing, it will micro adjust the focus fine and lock on. It always sounds like the motor is tyrying (while pressing the shutter button down half way) even when nothing is physically moving in the focus. Maybe a slipped gear? Anyhow, these lenses aren't terribly expensive, so I wonder if it's worth fixing or just outright replacing. Bought it used, so no warranty.

Has anyone had any experiences getting a motor/mechanical mechanism fixed in a Sigma lens and what it costs?

Thanks,

Vincent

Re: Sigma 28-70 f2.8 EX repair question

In reply to Vincent • Jun 11, 2004

Hi Vincent,

Sorry I can't help with your particular question but I am looking at this lens right now to buy.Can you tell me how it performs, ie is it sharp, does it perform well in low light etc etc etc

cheers

phil

ps got any samples with close crops

Re: Sigma 28-70 f2.8 EX repair question

In reply to Vincent • Jun 11, 2004

Here in the UK, Sigma will evaluate a lens and tell you what it will cost you to have it repaired. If you turn down the repair, then all you pay I think is the carriage back to you. Likely Sigma will offer the same service elsewhere.

http://www.sigma-imaging-uk.com/a_pages/lenses.htm

I had mine repaired this year under warranty. They did a good job and quickly too.

Nikon D7100 Nikon AF-S Nikkor 300mm f/4D ED-IF Nikon AF-S Micro-Nikkor 60mm F2.8G ED Nikon AF-S Teleconverter TC-14E II Nikon AF-S Teleconverter TC-20E II +14 more

Re: Sigma 28-70 f2.8 EX repair question

There's lots of info on this popular lens - the DF version mainly. Do a search on DPR. Briefly, it is optically the next best thing to a Canon 28-70L but for a third or less of the price - I think the the 28-70L is no longer made. Some have had copies of both and found little difference in optical performance. Great bargain. It focuses quickly enough - I have not found it hunting. Low-light focusing performance seems more restricted by the camera's ability - at least on my D60.

If I were buying now, I would wait and see what the recently released Sigma 24-60 EX offers in performance.

philbarrett wrote:

Hi Vincent,

Sorry I can't help with your particular question but I am looking
at this lens right now to buy.Can you tell me how it performs, ie
is it sharp, does it perform well in low light etc etc etc

cheers

phil

ps got any samples with close crops

Nikon D7100 Nikon AF-S Nikkor 300mm f/4D ED-IF Nikon AF-S Micro-Nikkor 60mm F2.8G ED Nikon AF-S Teleconverter TC-14E II Nikon AF-S Teleconverter TC-20E II +14 more

Barnsie • Contributing Member • Posts: 559

Re: Check KEH.com

In reply to Vincent • Jun 11, 2004

KEH.com has a repair center. I have not used them for repairs, but they have an automated system that might give you a rough price for the work. It might provide you with a little more information to make a decision.

Otherwise, I'd try sending it to Sigma anyway. At least get a quote before making it into a door stop. Worst that can happen is you find out that it's not worth repairing.

Barnsie

OP Vincent • Regular Member • Posts: 305

Re: Sigma 28-70 f2.8 EX repair question

Well, it's optically more than impressive for the price. Stunning even. This one is the older version without the DF system. Focus motor is inferior to Canons lenses. A tiny bit cooler image from it than a Canon lens and minor purple fringing around a hilight, but it's sharp, sharp sharp. Let me say this again, it's so sharp from f4.0 on that you would never it's guess it's a zoom from the images it takes. And f2.8 which is nice and bright in the viewfinder. Lens hood causes a shadow with the built in flash on my 10D. Not a big issue as I rarely use the built in flash. Minor annoyance - when the hood is on it makes it nearly impossible to get a lens cap off. My fingers a bit too big. I have to take the lens hood off to get the lens cap off. This lens is the only one I own with a perfectly flat front element. It's always been a bit of a focus hunter, way more than my Canon F2.8 lenses. Maybe an early indiciation of a problem lens?

I'd certainly buy it again.

Vincent

philbarrett wrote:

Hi Vincent,

Sorry I can't help with your particular question but I am looking
at this lens right now to buy.Can you tell me how it performs, ie
is it sharp, does it perform well in low light etc etc etc

cheers

phil

ps got any samples with close crops

searching • Regular Member • Posts: 145

Re: Sigma 28-70 f2.8 EX repair question

In reply to Vincent • Jun 12, 2004

I have the 24-70 2.8 EX DG and love it. It has super color, contrast and sharpness. It came new with a seven year warranty (in Canada). I think for the price I paid vis a vis a Canon 24-70 2.8L it is a super deal. I doubt the average person can see the difference in pictures.

OP Vincent • Regular Member • Posts: 305

New update

In reply to Vincent • Jul 23, 2004

Well, after much talking to people and running around it looks like it's going to be expensive to repair, almost as much as I paid for it in the first place. I paid $375 CAD for it, and the repair is expected to be around $300CAD. The local repair shops are use a "repair by replcaing parts" method. $300 was the cheapest quote.

When I was taking with one fellow in a used camera shop, he pointed out that the motor works sometimes, and thought the intermittance is likely weak contacts, or perhaps corrosion from condensation inside the lens... or even dried up lubricant.

Dead motor, weak contacts, dried lubricant?

So.... I'm awfully close to getting my screwdriver out and see what makes thins thing tick. And once I totally screw it up, I can go pick up the Canon 24-70 2.8L I've been wanting

Vincent

Re: Sigma 28-70 f2.8 EX repair question

In reply to Vincent • May 7, 2018

Use this :

Sigma Auto focus 28-70 D UC f1:2.8 nikon completely disassemble and reassemble, cleaning the lenses

https://youtu.be/V089QZm6CFk

Andy01 • Veteran Member • Posts: 4,631

Re: Sigma 28-70 f2.8 EX repair question

In reply to Khachool • May 8, 2018

Khachool wrote:

Use this :

Sigma Auto focus 28-70 D UC f1:2.8 nikon completely disassemble and reassemble, cleaning the lenses

https://youtu.be/V089QZm6CFk

I suspect that the OP might have moved on in the last 14 years since the last post

It has to be a new record for resurrecting.

Colin

Canon EOS M5 Canon 6D Mark II Canon EF 100mm F2.8L Macro IS USM Canon EF-M 22mm f/2 STM Canon EF 35mm F2 IS USM +5 more

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Sigma 28 200 Repair Parts Af Motor

Source: https://www.dpreview.com/forums/thread/863754

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