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Green Button Reminder
Pressing the green button when using a M lens to get a proper exposure will work only if item #26 in the Custom menu, "Green button in TAV & M" is set to TV shift. With this setting, the shutter speed is adjusted automatically (see p. 95 in the K20 operating manual) according to the aperture setting. Unless you have this setting, the green button does not work proerly when using M lenses.
Also, the exposure setting will remain the same until the green button is pressed again. This means that for bracketing or continuous shooting, the exposure determined by the first pressing of the green button will remain for the remainder of the shots.
I hope this helps to clarify things.
John
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