A photographer that had just purchased a D700 with approx. 5000 actuations, reported having a problem with approx. 1 in 250 shots. He thinks the sensor is bad. Neither the previous owner or original owner reported seeing any problem with the camera.
The photo below was submitted as an example of the issue. Has anyone seen or heard of a similar case. Does this sound like sensor problem? If the sensor is " bad", why does it only exhibit a problem in so few photos? Could this be related to some seldomly used mode?
If it's only 1 in 250 it's likely a corrupt NEF rather than a sensor problem. I suggest he troubleshoot the media side of things, starting with his CF card, and moving on to the reader if necessary.
Do you occasionally turn off the camera immediately after shooting a photo in an attempt to save the battery?
I experienced a similar problem that was a result of switching the camera off before the RAW image had been completely saved to the memory card. The camera was setup to save both a JPEG and RAW image. Once the habit was broken, the problem was solved.
I recently had a bad image image as above occur but only once. I believe it is because of the card. The bad image occurred when I used a Sandisk Ultra 8 GB - I now use a Sandisk Extreme 16 GB and no problems of late.
