Samsung's main camera plant in China is being converted to produce high-end mirrorless cameras instead of cheaper compacts. That's a steel-and-concrete sign that the manufacturer is trying to boost digital imaging profits by focusing on cameras with higher margins, and it implies a level adaptability that other companies can only dream of. Sammy's latest NX range of interchangeable-lens (ILC) mirrorless models start at around $700, which is at least twi