T2i suddenly produces way over exposed images

[tinwhistle]

About four years ago my friend bought the T2i with the 100 to 400 lens and the 1.4 extender. Until recently he loved that rig, but it suddenly started producing way over exposed images. He adjusted the exposure comp to two stops under exposed but still way to light. I should mention that he is a wildlife photographer and his equipment takes quite a beating. The camera has probably produced tens of thousands of images. He also is not on line. Any ideas that you may have that I can pass along to him? Thanks

Chris

[tinwhistle]

I'll be seeing him on Tuesday. I will try my Sigma 100X400 on his camera. Don't know why I didn't thin k of that myself. However, this fellow spends hours upon hours in various blinds over 300 acres and the number of exposures this camera has produced is staggering. I'm convinced that an  upgrade is in the future.....

tinwhistle aka Chris

[TCampbell]

The shutter on a T2i is rated for about 100,000 actuations.  So if he's spending that much time shooting, he may be approaching the point where the camera may need a shutter replacement (not really worth it for a T2i).

The 7D II is rated for 200,000.  

The original 7D, the 5D III, the 6D, and 70D are all rated for 150,000. 

The 1D X is rated for 400,000.

Since he's using a 100-400mm (I presume at the 400mm end) with a 1.4x multiplier which gets him to 560mm but he's at f/8 as the lowest focal ratio available.  The T2i isn't supposed to support autofocus at f/8 anyway (I'm guessng the camera struggles to auto-focus if auto-focus even works at all.)  Both Sigma and Tamron make a 150-600mm lens (I'm not sure about the trade-offs or whose is more popular.)  The lenses are popular among birders & wildlife photographers.