Nikon has just provided detailed instructions for D750 owners seeking repairs to correct an issue related to flare. The company had previously announced plans to service affected cameras for free, and has just issued information that will help camera owners identify whether their unit is included under the advisory. 

In the statement released by Nikon today, D750 owners are instructed to check their camera's serial number through Nikon's website. Owners of affected models will be provided advice about how to request service from the nearest Nikon service center. 

Some models identified by serial number as affected by the flare problem may have already been fixed - this is indicated by a black dot inside the tripod socket.  

Nikon formally acknowledged the issue earlier this month, responding to reports from D750 owners of unusual flare patterns when capturing backlit scenes with bright light sources. The issue has been attributed to internal reflections caused by the cameras' AF module, the precise placement of which affects the severity of the flare issue.