So I got my D7000 in January of 2013, and today Sept 2015, I have over 200,000 actuations. I was reviewing my archives from my shoots back in 2013, using my Nikon 50mm f/1.4G, I noticed that my photos were sharper and were more on point in focus to the subject's eyes back in 2013 compared to the photos I take today. The focusing I now have is slower even in low light, ( as in streetlight low light ) and im not getting any more good focus locks compared to before.
Just wanted to know if this can be repaired?
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Does a dSLR focusing system fail over time as it is being used for events photography?