The following notice has been issued by the manufacturer:
To users of the Nikon D750 digital SLR camera – possible image shading from shutter (update 12/07/2017)
Thank you for choosing Nikon for your photographic needs.
In July of 2015 and with an additional notice in February of 2016 we have announced that the shutter in some Nikon D750 digital SLR cameras manufactured between October of 2014 and June of 2015 does not function normally, sometimes resulting in shading of a portion of images. Since that time, further examination of the issue has clarified the fact that the same issue may occur with D750 cameras manufactured from July through September, 2014 and from July, 2015 through September, 2016.
Therefore, any D750 manufactured from July, 2014 through September, 2016 is eligible for inspection and repair of its shutter. Please direct inquiries regarding this issue to your nearest Nikon service centre.
We sincerely apologize for any inconvenience this issue may have caused.
To check whether or not your camera is one of those affected by this issue, click Affected Product Serial Numbers below and enter your D750 serial number as instructed. Your camera’s serial number will be checked against those of applicable products. If your camera is one of those affected, instructions for requesting repairs will be displayed. If your camera is not affected by this issue, rest assured that repairs to your camera are not necessary and you may continue using your camera without concern for this issue.
The camera’s serial number is the 7-digit number indicated by the red frame in the image above.
Please contact your nearest Nikon service centre if you own a Nikon D750 digital SLR camera to which this issue applies. They will keep your camera, and examine and repair the camera’s shutter free of charge, even if the camera’s warranty has expired.
We sincerely apologize for any inconvenience this matter may have caused you.
Please be assured that Nikon is continuously working and taking measures to further improve the quality of its products. Once again, thank you for choosing Nikon for your photographic needs.