Sigma Has Fixed 28-70mm Ghosting Issues, Will Replace Affected Units

In late March, Sigma published a service notice for the newly-announced 28-70mm f/2.8 lens where ghosting resistance may deteriorate in some circumstances. The company delayed shipping it in order to address the issue, and today Sigma has announced that the problem has been solved.

As reported by The Digital Picture, Sigma has announced that it has concluded its investigation into the issue and instituted countermeasures.

"As a result of our investigation, there is a possibility that the ghost resistance will deteriorate with some products from the initial lot," the company writes. "In addition, since we have confirmed the countermeasures by process management regarding this matter, we would like to inform you that we would like to collect all the products with the target serial number and replace them with new ones."

In the initial service announcement, Sigma noted that it believed that the issue was specific to Sigma 28-70mm f/2.8 DG DN Contemporary lenses for both L-mount and Sony E mount with serial numbers prior to 55488834. The company is sticking with that assessment after looking into the issue and offering to collect and replace any lenses that have made it into the wild that fit that description.

Sigma originally said that the number of lenses that were affected by this issue could not be particularly high, as the optic had only shipped in a few select locations globally. The United States, for example, had not yet begun fulfilling pre-orders at the time of the initial service announcement. At the time of publication, the lens was still not in inventory at Adorama.

To check the serial number of a Sigma lens, customers can either find it printed on the side of the box the lens was sold in or etched above the Sigma logo on the side of the lens as shown in the graphic below.

In order to get your lens replaced -- should yours have a serial number prior to 55488834 -- the company has asked that you contact your local authorized Sigma Service Station, which you can find using this link.

Sigma originally estimated that its investigation would conclude within a month, leaving customers unsure if the situation would allow for lenses to be fulfilled before April. However, Sigma announced and concluded its investigation into the issue in exactly two weeks, meaning it should not be long until the lens -- now free of the ghosting deterioration issue -- is widely available globally.

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Sigma Delays the 28-70mm f/2.8 Due to Ghost Resistance Deterioration

Sigma has published a service notice for its newly-announced 28-70mm f/2.8 lens. According to a detailed note on Sigma's website, the company has been made aware of the deterioration of the ghosting resistance on the lens over time under certain shooting conditions.

As reported by The Digital Picture, Sigma notes that a potential issue with the lens can lead to "increased ghosting over time in certain shooting conditions." The company apologizes for the situation, and notes that this falls short of its "usual high standards" and it is "acting as quickly as possible to rectify the issue."

The issue is currently specific to the Sigma 28-70mm F2.8 DG DN Contemporary for both L-mount and Sony E mount, with serial numbers prior to 55488834.

"You can find the serial number printed on the side of the lens, and also on the box. If your serial number is higher than 55488834 you can be assured it is not affected by this issue," Sigma writes.

The company says that the issue had been identified early on, so only a certain small subset of customers should be affected. It urges anyone who has already received the 28-70mm f/2.8 to check their lens' serial number to see if it is affected. This shouldn't be many lenses, as it only started shipping very recently in a few select markets.

There should not be many customers in the United States, for example, as retailers haven't yet started shipping the lens.

"Our optical engineers are working hard to identify and eradicate the underlying cause of the phenomenon, and we expect to have this resolved within a month," Sigma writes. "We will suspend all shipments of the applicable product until the cause of this matter has been identified. Once we know the cause, we will be in touch with the small number of affected customers to advise on whether we will repair their lens or replace it, and how this process will work."

The Sigma 28-70mm f/2.8 was originally announced in early February and slated for release on March 12 for both E-Mount and L-Mount for for $899. Given this issue, it's possible that the lens will not actually be set to ship to customers until late April or early May.

#equipment #news #degredation #delay #faulty #ghostingresistance #lenscoating #lensdelay #lensissue #shippingdelay #sigma #sigma2870f28dgdn

Sigma Delays the 28-70mm f/2.8 Due to Ghost Resistance Deterioration

Sigma has published a service notice for its newly-announced 28-70mm f/2.8 lens. According to a detailed note on Sigma's website, the company has been made aware of the deterioration of the ghosting resistance on the lens over time under certain shooting conditions.

As reported by The Digital Picture, Sigma notes that a potential issue with the lens can lead to "increased ghosting over time in certain shooting conditions." The company apologizes for the situation, and notes that this falls short of its "usual high standards" and it is "acting as quickly as possible to rectify the issue."

The issue is currently specific to the Sigma 28-70mm F2.8 DG DN Contemporary for both L-mount and Sony E mount, with serial numbers prior to 55488834.

"You can find the serial number printed on the side of the lens, and also on the box. If your serial number is higher than 55488834 you can be assured it is not affected by this issue," Sigma writes.

The company says that the issue had been identified early on, so only a certain small subset of customers should be affected. It urges anyone who has already received the 28-70mm f/2.8 to check their lens' serial number to see if it is affected. This shouldn't be many lenses, as it only started shipping very recently in a few select markets.

There should not be many customers in the United States, for example, as retailers haven't yet started shipping the lens.

"Our optical engineers are working hard to identify and eradicate the underlying cause of the phenomenon, and we expect to have this resolved within a month," Sigma writes. "We will suspend all shipments of the applicable product until the cause of this matter has been identified. Once we know the cause, we will be in touch with the small number of affected customers to advise on whether we will repair their lens or replace it, and how this process will work."

The Sigma 28-70mm f/2.8 was originally announced in early February and slated for release on March 12 for both E-Mount and L-Mount for for $899. Given this issue, it's possible that the lens will not actually be set to ship to customers until late April or early May.

#equipment #news #degredation #delay #faulty #ghostingresistance #lenscoating #lensdelay #lensissue #shippingdelay #sigma #sigma2870f28dgdn