Nikon has responded to complaints from some D600 users who have noticed tiny spots appearing on certain images and offered to replace the shutter free of charge.

In a new ‘technical service advisory‘, Nikon states: ‘Not all users have experienced this issue.

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‘Nikon has thoroughly evaluated these reports and has determined that these spots are caused by dust particles which may become visible when the camera is used in certain circumstances and/or with certain settings.’

Nikon points out that dust particles cannot be completely avoided when using a DSLR, even after sensor cleaning.

Nikon Europe, which first warned of the problem a year ago, urges

customers to contact their nearest service centre if they still

encounter ‘dark, granular spots’ in images after cleaning the camera’s

imaging sensor.

Nikon has pledged to inspect, clean and replace the shutter assembly – and related parts – free of charge.

The D600 – a full-frame DSLR – was launched in 2012, targeting ‘high-end enthusiasts’.

For full details, visit the UK section of the Nikon Europe website.