The k-7 was a rarity for me: I bought it brand new. I didn't have the nerve to preorder, but paid full price. I loved the look and feel but the sensor was similar to micro43 12-Mpx at the time. I had no pp skills so i bailed.
I've another arriving Thursday
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I'm still a pp novice.. but I know more about what's possible!
Among other things I'll be exploring the 3:2 HD video mode, a rare thing in this 16:9 world. I expect the k-s2 will win for stills, but the familiar body type is an important factor.