« on: October 16, 2013, 11:49:20 AM »
There are a number of problems I've encountered.
Video focus tracking is SLOW. OK for family groups moving at walking pace. Useless for birds or pets moving erratically and fast. Yet that is when it is needed.
Live view autofocus is slow. The so-called FAST MODE involves exit from live view, autofocus, then retrun to live view. SLOW INCONVENIENT at the least and USELESS FOR WILD LIFE.
A MAJOR FLAW in image processing of hand-held long tele pics. The out-of-focus background is USUALLY renders as streaking from top right to bottom left with replication of detail. Out of focus detail points should degenerate to rather circular blotches but with my 70D the streaking is more common. ALWAYS TOP RIGHT TO BOTTOM LEFT. I suspect image analysis/modification during image stabilization. This is with 500mm lens and 1/750 shutter speed or faster. With the same lens and even with slower shutter speeds this has never happened in 2 years with my 5D Mk II, or many years with my 300D.
Pity. The first photos I took with the 70D were the sharpest I'd obtained, and turned my 500mm lens into 800mm equivalent. The camera is heading back to Canon.
I've never seen oof area like this before. I would think it is either your particular camera, or camera shake.
Thanks for the heads up and photo to show it.