I made the leap from the K10D (2006) to K3. It's a treat and a new pleasure. I accompanied the battery handle, no problem of autonomy. For 40 years pentaxiste always arises the difficult choice of rebranding. I do not regret being remained faithful, even if the full format is planned for soon at Pentax. On the K3, I particularly appreciate: - The arrangements Burst - Raw HDR mode - Compactness - Ergonomics fact very intuitive despite the complexity of a case designed for "enlightened enthusiastic" - And of course the definition. With the software DxO Optics Pro10, I'm ready for the next 5 years.