[André Sena]

Sigma 28-70mm F2.8 DG GN - Sony E-mount e L-mount - importante: problema de ghosting com algumas lentes.
Fonte:
https://www.dpreview.com/news/1567066764/sigma-has-fixed-ghosting-issues-with-its-28mm-f1-8-dg-dn-lens-is-replacing-affected-lenses

Em março a Sigma emitir uma comunicação informando sobre o problema e como identificar pelo número de série da lente se a mesma faz parte do grupo afetado.
https://www.sigmaphoto.com/article/potential-issue-of-ghost-resistance-deterioration-of-the-sigma-28-70mm/

Ontem a Sigma divulgou uma nova comunicação sobre o problema"
https://www.sigma-global.com/en/news/2021/04/09/13682/

Regarding the interchangeable lens “SIGMA 28-70mm F2.8 DG DN | Contemporary” for mirrorless cameras announced on March 23rd, 2021, as a result of our investigation, there is a possibility that the ghost resistance will deteriorate with some products from the initial lot.

In addition, since we have confirmed the countermeasures by process management regarding this matter, we would like to inform you below that we would like to collect all the products with the target serial number and replace them with new ones.

【Treatment on this issue】
We will respond by replacing the applicable product with a new one.
For further information, please contact your local authorized SIGMA Service Station listed in the link below:
https://www.sigma-global.com/en/world-network/

* acesse os links para ver mais detalhes sobre o problema.