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ISO priority mode?
As you may know, DSLRs have a S or Tv mode where you set the shutter speed and the camera sets the aperture, or a A or Av button where you set the aperture and the camera sets the shutter.
The new Pentax K20D and Samsung GX20 have a TAV mode, where you set the aperture and shutter and the camera sets the ISO to take the shot. Interesting.
Since the latest frontier of camera technology is shooting at high ISO possibly this is the wave of the future. High ISO can eliminate lens sweet spots, reduce the need for flash, and speed up your shutter. It’s all useful stuff, but I’d still stick with Nikon, Canon or Sony for the time being unless you are absolutely sure you can get all the lenses you’ll ever need for the pentax/samsung.